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This post is about how to solve the error: “Error getting license. License server communication problem: E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER”.

Reason For This Error

This error is related to Adobe’s DRM (digital rights management) for ebooks. If you’re getting this error, it means that your copy of Adobe Digital Editions has not been authorized with the correct Adobe ID.

This can happen a few different ways:

  • You originally downloaded the ebook on a different computer, and the computer you’re using now is authorized with a different Adobe ID or isn’t authorized at all.
  • You got the ebook illegally, either from a friend who emailed it to you, or through an illegal download.
  • You bought the book legally but have screwed up your authorizations through some other manner, like trying to use two different Adobe IDs.

What Is “Authorization” and “Adobe ID”?

Adobe’s DRM works by associating each ebook with your Adobe ID. The “Adobe ID” is simply a free account that you set up with Adobe. If you’ve ever used their forums or downloaded any of their software you probably already have one. You can sign up for an Adobe ID here.

If you’re going to be using ebooks that are protected with this DRM, you should first authorize Adobe Digital Editions with your Adobe ID. That will associate the ebook with your Adobe ID, and allow you to put the ebook on another computer or device later on. If you associate each computer/device with the same Adobe ID, you can then use that ebook on all of those devices.

If Adobe Digital Editions has been authorized with a different Adobe ID than the one which the ebook has been associated, then it won’t open on that computer or device.

How To Fix This Error

If you’re getting an error message that indicates that the licensing for the ebook is causing a problem, that means that you have authorized Adobe Digital Editions (or an app on your device) with the wrong Adobe ID. The only way to solve this is to authorize it with the correct Adobe ID.

How do you know what the correct Adobe ID is? Well, the best way to be certain is to only ever use one Adobe ID. That way, you won’t mix them up. If you’ve forgotten your username or password, use Adobe’s website to find them. If you’ve downloaded the ebook illegally, there is no way to know which Adobe ID is the correct one since the ebook came from some unknown person.

Once you’ve remembered which Adobe ID you’re supposed to be using, you need to de-authorize Adobe Digital Editions and then authorize with the correct Adobe ID.

How To De-Authorize Adobe Digital Editions

1. Open Adobe Digital Editions

2. On your keyboard, simultaneously press the Ctrl, Shift, and D buttons (if on Windows) or the Cmd, Shift, and D buttons (if on a Mac)

3. Click the “Deauthorize” button

How to Authorize Adobe Digital Editions

1. Open Adobe Digital Editions

2. Adobe Digital Editions will behave as if you’ve just installed it, and will prompt you to enter your login information for your Adobe ID. Use the Adobe ID account information that you want to use to authorize Adobe Digital Editions.

Thinking about getting into eBooks? Start here.

If you’re completely new to the world of ebooks, this post is for you. There are so many options available now that it can be confusing for newbies. Kindle, Nook, iPad! Which is the best for you? If you’re not at least basically aware of the consequences of your choices, you can end up with a bad experience. But not to worry! This post will give you enough background on ebooks to get started. I’ve broken it into two sections, for those who already own a device that they want to read ebooks on, and for those who want to get a new device for ebook reading.


This is the process I recommend for you if you want to read ebooks on a device that you already own. This might be your smartphone, iPad or other tablet, or an eReader that you acquired in the past.

1. Do Not Buy or Download Any eBooks Yet

eBooks come in different formats, and not every format can be read on every device. Before you spend any money buying eBooks, follow the next few steps. This will save you money, time, and confusion.

2. Learn Which Types of eBooks You Can Use

If you have an eReader (like a BeBook, Cybook, Sony Reader) that’s not tied to a specific bookseller, the best thing to do is to go to the website that sells that device and look in the specifications to find out which ebook formats it supports. Also look for support for “DRM” (digital rights management) because without it, the types of ebooks you can use will be further restricted. Most eReaders can read PDF and ePub files and some can read additional file types like Mobi, txt, and others.

If you have an eReader (like a Kindle, Nook, or Kobo) that is associated with a specific bookseller you won’t have to worry about file types if you only purchase ebooks from that specific store. However, the Nook and Kobo eReaders can also read PDF or ePub files from other sources.

If you want to read ebooks on your iPhone or iPad, you can use iBooks, which is built into Apple’s system. By doing so you can easily get ebooks in the same manner that you download apps. You can also read PDF or ePub if you get an app that can handle those file types. In addition to that, big booksellers like Amazon and B&N have iOS apps that will let you read their ebooks without having to own a Kindle or Nook device.

If you have an Android phone or tablet, you can read Kindle and Nook ebooks with their respective Android apps. You can also read PDF or ePub if you get an app that can handle those file types.

3. Install Software/Apps If Necessary

E-Ink eReaders like the basic Kindle and Nook eReaders don’t need apps. But if you want to read on your iPhone, iPad, or Android device, you’ll need an app for reading ebooks. The best one to use depends on where you’ll buy your ebooks. I have explained this in more detail in previous posts: Best eBook Apps for iPad and iPhone, Best eBook Apps for Android

4. Find Out Where Your Type of eBooks Are Sold

Here are the basics:

If you have a Kindle then you must buy ebooks from Amazon.
If you have a Nook you can buy eBooks from Barnes & Noble or any ebook store that sells PDF or ePub ebooks.
If you have a Kobo you can buy eBooks from Kobo or any ebook store that sells PDF or ePub ebooks.
If you have an iPad or iPhone you can buy eBooks from iBooks, use the iOS app from Amazon/B&N/Kobo, or any ebook store that sells PDF or ePub ebooks (check DRM requirements – you might need a specific app).
If you have an Android phone or tablet you can use the Android app from Amazon/B&N/Kobo, or buy from any ebook store that sells PDF or ePub ebooks (check DRM requirements – you might need a specific app).
If you have another eReader (like a BeBook, Sony Reader, etc) you can buy eBooks from any ebook store that sells PDF or ePub ebooks (check DRM requirements – you might need a specific app).
If you have an off-brand cheaper eReader, you can probably use PDF and ePub ebooks, but you might not be able to use DRM-protected files. It’s vital that you check the specifications for your particular eReader.

5. Get eBooks!

Once you’ve done all of the research and learning above, go forth and buy ebooks from your chosen book store.


This is the process that I recommend if you don’t yet own a device for ebook reading, or if you’re not yet sure which device you want to use.

1. Do Not Buy an eReader or Tablet First

Don’t buy anything until you have a basic grasp on the options available.

2. Consider eBook Stores

My recommendation is to first figure out where you want to buy ebooks. This will narrow down your device choices. For example, if you really want to buy most of your ebooks from Amazon, you should get a Kindle. (You can also read Kindle ebooks on an iPad, iPhone, or Android device with the Kindle app). Likewise, if you really want to buy your ebooks from Barnes & Noble, you should get a Nook. (You can also use an iPad, iPhone, or Android device with the Nook app). The same goes for Kobo. If you like buying things from Apple and would like to buy your ebooks through iBooks, you should get an iPad. If you’re the type of person who wants to buy from smaller ebook websites, you can pick and choose from a few different sites like,, or, as well as others. They will be able to support a lot of devices with the main exception being the Kindle. However, the process isn’t as streamlined as when you buy a specific type of ebook for a specific type of device, like a Kindle ebook for a Kindle eReader.

3. Based on Your Store Choice, Consider eBook Readers

Let’s say you decided that you’d really like to buy all of your ebooks from Amazon. That makes it pretty easy because you can get any Kindle model that you want. (Note that Kindle is not synonymous with eReader. A Kindle is the type of eReader sold at The same goes for Barnes & Noble — just get one of the Nook models. If you would like more variety, you could consider getting and iPad or Android tablet. That’s a great choice because you can use ebooks from a variety of sources, and you’ll also have a fully functional tablet computer that you can use for web browsing, movies, or whatever else.

4. Buy Your Chosen eReader

Once you know where you want to buy your ebooks and what kind of device you want to use for reading, go get your eReader!

5. Install Software/Apps If Necessary

Depending on what kind of device you’ve chosen, you might need to install an app or other software. E-Ink eReaders like the basic Kindle and Nook eReaders don’t need apps. But if you want to read on your iPhone, iPad, or Android device, you’ll need an app for reading ebooks. The best one to use depends on where you’ll buy your ebooks. I have explained this in more detail in previous posts: Best eBook Apps for iPad and iPhone, Best eBook Apps for Android

6. Get eBooks!

Go forth and buy ebooks.

I hope this guide is helpful for ebook newbies. If you have any more tips for someone who is completely new to ebooks, leave them in the comments.

How To Open .acsm Files

ACSM files (files that end with .acsm) often cause confusion for those who are unfamiliar with them. This post will tell you what you need to do to open them.

Basic Information

  • ASCM files are part of Adobe’s eBook DRM.
  • ACSM files are not supposed to be the full eBook. They are small files that manage the download of the eBook.
  • ACSM files are made to be opened with Adobe Digital Editions. This is a free program from Adobe that was created for their eBook DRM. Get it here.
  • To open an ACSM file, simply double-click it, and it should open in Adobe Digital Editions if you have that program installed.
  • Opening the ACSM file in Adobe Digital Editions will allow it to continue your eBook download. When it’s finished you’ll have a PDF or ePub file.

Advanced Information


If you’re downloading an .acsm file, it’s probably an eBook with DRM, so you should also make sure that Adobe Digital Editions is properly authorized. I have a post that explains this process for you. Authorizing your copy of Adobe Digital Editions with an Adobe ID will allow you to use your eBook on more than one computer as well as your mobile devices that support Adobe’s DRM.

ACSM files on iOS, Android, or eReaders

Sometimes people will try to download a DRM-protected PDF or ePub directly to their iPhone/iPad/eReader/Android device. That won’t work because the .acsm file can’t be opened in any apps on those devices. The eBook must be downloaded to your computer first, through Adobe Digital Editions. There is no version of Adobe Digital Editions for iOS, Android, or eReaders. After you’ve downloaded the ebook to your computer, you can then transfer it to your device.

Convert .acsm to PDF?

Often when people are unfamiliar with .acsm files they think they should convert the file to a PDF. This is not possible, and it arises from the mistaken assumption that the .acsm file is the eBook and they’ve somehow downloaded a weird file type. If you have an .acsm file, the only thing you can do is open it with Adobe Digital Editions. That will continue the eBook download process, and once that’s finished, you’ll have your PDF/ePub file.

File Associations

It’s easy for your computer’s file associations to get messed up when you try to open a file in the wrong program. If you’ve downloaded an .acsm file and you tried to open it in, for example, Adobe Reader or Adobe Acrobat, you might have checked the little box that says “Always open files of this type in this program”. If you did that, you’ve screwed up your file associations and .acsm files will always try to open themselves in the wrong program.

To fix this, you’ll need to edit your file associations. Instructions on now to change file associations on a Mac | Instructions on now to change file associations on Windows Vista & 7

How To Open ACSM Files

There are always three ways to open a file on your computer:

1. Double-click it. It will open in the program that your computer has associated with that file type. See above if you’ve associated .acsm files with the wrong program.

2. Right-click it. Right-click the file, go to “Open With”, and choose Adobe Digital Editions.

3. Open manually from inside the program. Open Adobe Digital Editions. In the upper left area, find LIBRARY. Click the downward arrow next to Library, and click on “Open”. Find the file on your computer. It should be in a folder called My Digital Editions, which is in the main Documents folder.

Get some free ebooks!

Six Tips For Avoiding Display Problems When Creating eBooks

Part of my job over the past 10+ years in the ebook industry has been the creation of ebooks. Over the years the popular formats have changed and the software used to create ebooks has changed, but there are some concepts about text manipulation that have remained constant. Whether you’re creating ebooks for ePub, PDF, iBooks, tablets, smartphones, or Kindle, there are common mistakes that can be avoided. The information I’m presenting here is based on my own experience, so your mileage may vary.

1. Try not to do any conversions straight from Microsoft Word

Microsoft Word is a good program and it’s fine to type your book in it, but Microsoft Word documents don’t convert well into other text formats, like HTML. A lot of ebook creation programs let you import HTML files, which are excellent to use because you can customize the textas much as you want, but the “HTML” that Microsoft Word creates is not really HTML. If you simply take your Word document and “Save As” HTML, you get Microsoft Word’s abomination of HTML, and it doesn’t behave in the same way as real HTML. It’s got a ton of extra junk code in it that isn’t very readable by other programs and you’ll probably end up with a bunch of weird formatting issues.

Instead of using Microsoft Word to create your HTML, make it yourself with a different application. The first step is to save the document as a plain .txt file. Yes, this will strip out all of your formatting, but it will also strip out all of the nonsense code that Microsoft Word creates. I recommend a program like AscToHTM for converting text to HTML, but you can use any other similar program that you like. Make sure you save a copy of your original Word document before you start messing with it.

2. Do small-scale testing

If you’re new to creating ebooks, or if you’re new to text manipulation, or if you’re just new to the particular application that you’re using, do some testing first. For example, copy one chapter of your ebook and make an ebook out of that. This way you can learn how the software behaves without going through all of the work of converting your entire book into ebook format and having to go back and fix mistakes throughout the entire text. You can experiment with things like headings, images, margins, etc, and find out what looks best.

3. Test on an eReader, smartphone, tablet

Test your ebook on as many different types of devices as possible. If you only look at the ebook on your computer screen, you won’t know what it will look like on an eReader, an iPhone, an Android tablet, or whatever else people might read your ebook on. I understand that you might not own all of these devices, but see if you can borrow one from a friend and at least test the ebook on your own phone.

4. Consider small screens

Does your ebook have giant, complicated graphs and charts? Those might not be readable on the small screen of a phone and it will be very important to test it. Images can safely be about 600×400 pixels but even at that size the text will need to be relatively large in order to be readable. If your huge graph has 10pt text that’s imperative for the reader, they’re just not going to be able to read it on small screens.

5. Keep fonts and layout as simple as possible

eReaders like the Kindle, Sony Reader, or Kobo eReader don’t have access to very many fonts. You’ll do best by sticking to the most default font type available. I recommend that you not specify a font at all. That way the eReader can display your text as naturally as possible, and if the ebook reading app does allow the user to change font sizes, they can do that without your book trying to force a font on them.

Footnotes have become a big problem in ebook creation and the reason is, once again, different screen sizes. You have to make an ebook that can display correctly on a computer screen, an eReader, a tablet, and a smartphone, and all of these devices have very different screen sizes. They won’t show the same amount of pages, the same page numbers, or the same amount of text on the screen. This means that you can’t define the bottom of a page for your footnotes because each screen will have a different “bottom” of the page. You could consider moving all of your footnotes to the end of the chapter, and linking to them from the text with hyperlinks.

6. Carefully look through your text

When authors see their book in a different format (say, PDF instead of Microsoft Word) suddenly a lot of typos jump out at them that they didn’t see before. Once you’ve converted your book into .txt, HTML, or an ebook format, you should scan through the entire text to look for errors or typos. You should also scan through the entire text to look for problems that might have been created during the conversion from format to format. You can use this as an opportunity to make sure everything you want to be italic is italic, everything you want to be indented is indented, etc.

All of this might sound like a lot more work that you anticipated, but if you put in the time and effort you’ll end up with a quality ebook, and that’s worth it.

Help for New eReader Owners

There are lots of people who unwrapped shiny new eReaders over this past Christmas weekend. This blog is largely written for those who are new to the world of ebooks and e-reading devices, so I try to help folks out with learning the basics.

Perhaps the best place to start might be with my post of eBook Terms for Newbies. That will help you get familiar with some commonly used terms that you might not have been aware of before. Making yourself comfortable with those terms will help you when you start trying to follow instructions for downloading ebooks and using your eReader.

Last year I wrote a post titled “You got an eBook Reader as a gift. Now what?” It gives you a solid set of guidelines to use when learning how your new eReader functions. I really recommend reading that if you’re using your first eReader. The information will help you avoid many of the common problems that people run into, and it should also generally help you learn how to work with your eReader.

My “Top 5 Reasons Why Your eBook Isn’t Opening” is a good place to look when you’re having trouble. It covers hardware issues, software issues, and DRM issues.

If you need help with Adobe Digital Editions, or would just like to learn more about it before you use it, check out these posts:

Adobe Digital Editions — An overview of authorizing and using the program.
How To Authorize Your eReader for Adobe Digital Editions — Step by step instructions.
ACSM Files — What they are and how to work with them. Hint: they are not ebooks!
How To Change the Authorized Adobe ID — Learn how to switch the Adobe ID that your computer is authorized with.

If you’re using a new iPad, iPhone, or iPod Touch, and you want to read ebooks with Adobe DRM (that were not purchased through Apple’s iBooks) I recommend Bluefire Reader. My Bluefire Reader post has really detailed step-by-step instructions for how to authorize it and how to transfer your ebooks to your device through iTunes.

Likewise, if you’ve got a new Android toy (smartphone or tablet) you can take a look at my post about Aldiko, the recommended app for ebook reading on Android.

If you’ve got pretty much anything other than a new Kindle, you can download some free ebooks here. That’s a great way to test out your eReader since if you make a mistake it won’t cost you anything.

Overall, here are my most basic recommendations for using a new eReader:
1. Learn which ebook formats your device is able to read.
2. Before buying any ebooks, make sure the website you’re using can support your eReader.
3. Take a moment to read your manual and learn the basic functionality of your eReader.
4. Always follow posted instructions! Don’t skip anything.

Happy reading!

eBook Terms for Newbies

With all of the work I do on a daily basis involving ebooks and the devices that read ebooks, it can be easy to forget that there are a lot of people out there that haven’t ever used an ebook. If you’re new to ebooks you might be totally confused and overwhelmed with all of the unfamiliar terms that are used. This list will give you an introduction to what you’re most likely to run into in today’s world of ebooks. Some of these terms reference each other, so just look elsewhere in this list for the explanation of terms in italics.


Adobe Digital Editions – This is a program developed by the company Adobe (the same company that brought you Adobe Reader and Adobe Acrobat, as well as Photoshop and Flash, etc etc). This particular program is made specifically to work with Adobe’s DRM system for ebooks. It also lets you view PDF and ePub files. You can download Adobe Digital Editions here, and read more about it on my Adobe Digital Editions post.

Adobe ID – If you’re going to buy PDF or ePub ebooks from a website, those protected by Adobe’s DRM will require that you authorize your copy of Adobe Digital Editions with an Adobe ID. This is the same Adobe ID that you use if you purchase downloadable software from Adobe. It’s best to only use one Adobe ID so that you don’t mix up multiple accounts (doing that will result in ebook licensing errors). You can create an Adobe ID here.

Aldiko – Aldiko Book Reader is an app for ebook reading on Android smartphones and tablets. Download Aldiko here, and see my post about Aldiko here. Aldiko will read ebooks with Adobe DRM, and also plain PDF and ePub files.

Android – Android is an operating system that runs on mobile devices like smartphones and tablets. See the Android Wikipedia page for more information.

App – “App” is short for application. This has become a standard word to describe small software programs that are used on smartphones and tablets. This includes ebook apps like Aldiko, Bluefire Reader and iBooks.

Authorize – Reading ebooks that are protected by DRM usually requires that you “authorize” your software with a user account. When working with Adobe’s DRM, you must authorize with your Adobe ID account. Authorization is similar to registering your software. It is the way in which the software recognizes that you are the person who purchased the ebook and legally have the right to use it. It allows you to use your ebooks on more than one computer or device.

BeBook – BeBook is a popular brand of eReader and tablet devices. BeBook models include the BeBook Neo, BeBook Club, and BeBook Live tablet.

Bluefire Reader – Bluefire Reader is an app for reading eBooks on iOS. You can download Bluefire Reader here, and read my post with instructions here. Bluefire Reader will read ebooks with Adobe DRM, and also plain PDF and ePub files.

DRM – DRM stands for Digital Rights Management. It is digital security that protects a publisher’s legal copyrights by preventing users from illegally pirating ebooks. Adobe provides DRM that is commonly used by ebook sellers.

eBook – eBook is short for electronic book. eBooks are books in digital format that can be read on your computer or mobile devices.

E-Ink – E-Ink is short for electronic ink. It is the technology used in many eReader devices. These devices use matte screens (non-glossy) that are engineered to display words as if it was ink printed on paper.

ePub – ePub is the current open ebook format that is standardized by the International Digital Publishing Forum (IDPF). ePub files come with the .epub file extension and can be read with a variety of different ebook programs and e-reading devices. They are easy to use and create. See my post about the best free ePub readers.

eReader – eReader is short for electronic reader. It usually refers to devices that are used to read ebooks, such as the Amazon Kindle, Barnes & Noble Nook, and many others.

Format – “Format” refers to the type of ebook. The most common ebook formats nowadays are PDF, ePub, and Kindle. Different eReaders can use different formats, but most can use PDF and ePub. The Kindle can generally only use special Kindle ebooks with the .azw extension. Format also can be used to describe books in print, such as “paper back” or “hard back”. It’s also the same way different music media are described, such as the familiar “CD” or “mp3”. All of these terms describe different formats.

iBooks – iBooks is the native eBook reading app on iOS devices. You can purchase eBooks for iBooks through iTunes.

iOS – iOS is the name of the operating system that runs on mobile Apple devices: the iPad, iPhone, and iPod Touch.

Kindle – The Kindle is the eReader developed and sold by Amazon. It is the most popular eReader available today, mostly due to Amazon’s excellent marketing of the device, and the ease of purchasing and downloading eBooks for it from

Kobo – Kobo is the company that sells Kobo eReaders, including the original Kobo eReader, the Kobo eReader touch, and the Kobo Vox Tablet.

Nook – Nook is the name of the eReaders sold by Barnes & Noble, including the Nook 1st Edition, Nook Touch, Nook Color, and Nook Tablet.

PDF – PDF is a popular eBook format. PDF eBook files have the extension .pdf. When not protected by DRM, PDF eBooks can be read in generally any PDF-reader software. If protected by Adobe’s DRM, they must be opened with Adobe Digital Editions.

Sony Reader – Sony has released many eReaders under the Sony brand, most of which have model names that start with “PRS”.

Tablet – A tablet is a flat, slate-like electronic device. They are very similar to smartphones, often evening running the same software, just in a larger physical size. Popular tablet models include the iPad, Samsung Galaxy Tab, Kindle Fire, Motorola Xoom, and many others. These tablets make excellent eBook reading devices with their larger screens and availability of ebook apps.

A Quick Post About File Saving

Lately I’ve noticed another trend regarding ebook users and a point of confusion for them. This is a very simple concept but the confusion around it seems to affect both novice and veteran ebook/computer users.

Here’s what happens:

The person does a great job of following instructions for downloading the ebook file, and they even follow the recommended procedure for authorizing their software. They download the ebook file to their computer and all is well.

Saving eBooks To Your Hard Drive

An Image of a Hard Drive

At this point, the next step is to transfer the file to their device. Whether it’s an e-reader, Palm, Windows Mobile, or something else, it’s the same concept: if you’ve downloaded a file to your computer, and you want to also have that file on your device, the file has to be transferred from your computer to your device.

And something goes wrong here. Perhaps the user has a brain freeze, or perhaps they actually don’t understand, but they look at their device and they don’t see the ebook on it, and they can’t comprehend why it isn’t there.

It might be some kind of mixed-up confusion stemming from the fact that sometimes you can download a file directly to a device. For examples, when you buy an app on your phone, or if you have a Kindle and you buy an ebook from within the Kindle itself.

But that’s not what’s going on in this situation. The user has downloaded a file to their computer, and they know that they’ve done that. They see it on their computer. Then they look at their e-reader, and they don’t see it there, and they don’t understand why.

If this describes you, let me clear it up. When you download any file to your computer (an ebook or any other file), it only gets saved onto your computer’s hard drive. I don’t know of any mechanism that will ever save a file to your computer and another location simultaneously. (That’s not to say that there is no software in existence that can automatically copy a file from one location to another, but if you don’t have something like that installed, don’t expect it to happen on its own, because it won’t.)

The method by which you transfer the ebook to your device will vary a bit with each type of device, but in general, you can probably load the ebook onto it just like you would any other file. If you’ve got a Palm or Windows Mobile you just use the Sync software that it came with. If you’ve got an e-reader you can plug it into your computer via USB and transfer the file over the same way you would with an external drive. If your ebook has DRM you might have to use Adobe Digital Editions or some other software, depending on the format of the ebook. That’s enough for a whole different post, and I’ve explained the use of Adobe Digital Editions before.

So here’s a small summary: When you download a file to your computer, it is only saved to your computer’s hard drive. If you’d like to use that file on another device, go ahead and copy it over to that device.

Search Terms

I was looking through the stats for this blog and noticed some themes in the search terms that people use to get to this website. I know that posting those just perpetuates the same information, but I want to make sure that people get to the correct pages to find answers to their questions.

Adobe Digital Editions and ACSM Files

The bulk of the search terms have to do with Adobe Digital Editions and .acsm files. I wrote an entire post about what .acsm files are because I know that people are very confused about them. This is a sampling of the related search terms:

acsm files to epub
convert .acsm to .pdf
convert acsm
adobe digital editions how to save to another format
how to open acsm file
ascm what support e reader
how many devices does adobe digital editions allow
can you authorize more than one device to adobe digital editions
download failed. content has already been authorised to another user. adobe error

Please see my post about .acsm files to learn everything you need. In a nutshell: they must be opened with Adobe Digital Editions. You can’t convert them to any other file type.

Adobe has a big list of all of the e-reader device types that they support. Check that to see if your device is included.

As far as I know, they allow you to authorize up to 6 computers and/or devices with the same Adobe ID. If you’re getting an error message that says the ebook was already licensed to a different user, that means you’re using the wrong Adobe ID.

Android Tablets

Another group of search terms has to do with Android-powered tablets.

what ebook reader to use on my xoom
importing ebooks from pc to aldiko android
androide adobe drm ereader
samsung galaxy for reading e books
how to put ebook on android tablet

The ebook reader app that I recommend for all Android phones and tablets is Aldiko. The post I wrote about it explains how to use it. It supports Adobe DRM and non-DRM ebooks.

iOS DRM eBook Apps

There are similar search terms that indicate people want to know how to read DRM ebooks on iOS devices like the iPhone, iPod Touch, and iPad. Examples:

drm ebook apps for ipod touch
adobe ebook to itunes

For that, I recommend Bluefire Reader. Like Aldiko, it supports DRM and non-DRM Adobe ebooks.

Other General ebook Stuff

Then there are also general search terms related to ebook usage, such as:

ebook reader v tablets
why ebooks have grown in popularity
software for .azw readers for computers
possible ereaders
ereaders formats

See my fabulous Squidoo lens for information about eReaders vs Tablets.

Why have ebooks grown in popularity? I think the biggest boom came when Amazon released newer versions of the Kindle. After that, more and more e-readers became more popular. eBooks have been around for a long time, but Amazon managed to make the Kindle a household name, and that boosted the entire ebook industry.

.azw is the file extension of a Kindle ebook. If you want to read that on your computer, you can use the Kindle app.

If you just want to learn about “possible ereaders” then you should check out my eReader Comparisons page for an overview. My eBook Software page covers all of the ereader formats that I’ve reviewed so far.

Five Situations In Which You Should Not Use eBooks

eBooks have grown in popularity over the past couple years, largely due to new ebook readers that have become available and more affordable. Many people are giving ebooks a try now that they have become more of a mainstream product. eBooks are excellent for a variety of reasons, but there are some situations in which purchasing an ebook is not the best choice. The following situations are those that I have identified as the five most common.

When You’re Not Comfortable With Technology

Five Situations In Which You Should Not Use eBooksIn order to successfully use an ebook, you must be able to install software, download a file, and open the file in the correct program on your computer. If you want to read the ebook on a mobile phone or e-reader device, then you need to know how to transfer files between your computer and that device. You might also need to install a program or app on your mobile device. If you’re not already comfortable with these processes, ebooks might be difficult for you to use.

When You Need a Printed Book

Many ebooks, if not most ebooks, are not printable. Even ebooks in PDF format are often not printable. This is because book publishers are concerned about copyright protection. They disable the printing function so that people can’t make illegal copies of the book. Other ebook formats, such as Mobipocket or Microsoft Reader, don’t have a printing function at all. In general, ebooks are meant to be read on your computer, e-reader, or other mobile device.

Besides the question of whether or not the ebook will be printable, printer paper and ink is not free, so you’d end up paying for the ebook and then paying more to print it yourself. If you need a printed book for any reason you should buy the paperback or hardback version of the book.

When You Want To Give The Book as a Gift

eBooks are often not able to be given as a gift for the same reason that they aren’t printable. Book publishers are very concerned about software piracy, so most ebooks are sold with DRM (digital rights management), which ties the ebook to a specific user account. If you email an ebook to someone else, or give it to them on a disk or flash drive, the ebook won’t open once it’s on their computer because their software is not registered to your user account. If you would like to give an ebook as a gift, look for a gift certificate option instead of buying the ebook yourself.

When You Don’t Know What You Need

Before you buy an ebook, it’s best to do a little bit of research to find out what type of ebook you need. eBooks come in different formats, and not all work on every operating system or mobile device. If you don’t already know, find out which operating system your computer or device uses. From there, you can research ebook formats and determine which format will work on your operating system. Next, you should install any software that’s required for that type of ebook. Once you’ve taken those preliminary steps, you’ll be ready to find ebooks that you want to read.

When You Want The Text Read Out Loud

“Text-to-speech” is sometimes a feature that people look for when buying ebooks. Unfortunately, it is often disabled in the ebook (again, because of DRM), and sometimes it’s just not available at all. Even when it is available, it’s just not very good. Sometimes people even buy ebooks with the intent of putting them onto their iPod to listen to. That is not what ebooks were designed for, and it doesn’t work at all because ebooks don’t contain an audio track. When you want an audio recording of a book, the best option is to buy the audiobook instead of the ebook.


The situations I’ve explained above are not only common situations in which you should not use ebooks; they are also some of the most frequent reasons why people get frustrated with ebooks. When someone buys an ebook with the hope that it will do something that ebooks aren’t capable of, they quickly become disappointed.

eBooks aren’t meant to replace paper books, and you don’t have to use them. It’s best to think of ebooks as just one book format that is available. You wouldn’t buy an audiobook when you wanted a paper book, and likewise, there is no need to buy an ebook if it’s not really the best choice for you. Use ebooks when you want a book in digital format to read on your computer, e-reader, tablet, or mobile phone.

The Top 5 Reasons Why Your eBook Isn’t Opening — #5: The eBook File is Corrupted or The Download Link is Bad

This is an article series that will explain the most common reasons why ebook users have trouble opening an ebook that was purchased from an ebook retail website. Most of these issues are easily avoided by simply following your download instructions, installing the software you need, and making sure that you’re using the correct ebook format for your eReader. This post covers reason #5: The eBook File is Corrupted or The Download Link is Bad.

These are the least commons reason why your ebook isn’t opening correctly, but they do happen from time to time.

Sometimes the website selling the ebook will have made a mistake in the download link, which will cause it to not work when you attempt to download your ebook. Even the people running ebook websites are humans, so mistakes can be made. Sometimes the problem originated before it even got to the ebook store. When a book publisher wants to sell their books as ebooks, often they list their ebooks with a company that distributes ebooks and provides DRM on the downloads. The book publisher must provide the distributor with all of the pertinent information about the ebook, including the file name. If that file name is provided incorrectly, it will still be incorrect when it gets to the ebook store.

Sometimes the ebook file itself has become corrupted. These files have to be sent from the book publisher to the distributor to the ebook store, and they go through a lot of different servers during that time, they’re stored in multiple databases, and the download happens through multiple pieces of software. It is a bit of a miracle that the files don’t get corrupted a lot more than they do. If you end up with an ebook file that has become corrupted and won’t open, keep this in mind.

However, remember that these occurrences are not common. The majority of the time, when an ebook isn’t opening the reason is that the user is trying to open it with the wrong software or the wrong e-reader device. For example, if you try to open a DRM-protected PDF file with Adobe Reader, the program will give you a message that the file is corrupt. In this case, the file is not actually corrupt — that’s just the only way that Adobe Reader knows how to tell you that it can’t open the file when it’s meant for Adobe Digital Editions.

If you’ve found this post through Google and haven’t yet read through the more common reasons why your ebook isn’t opening, please check those out first before you assume that your ebook file is corrupted. See all posts in this series.

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