17 Open Textbook Formats
You will notice that open textbooks are available in a number of different technical formats, some of which may not be familiar to you. The reason for this is because research into student preferences around textbook formats shows that students want flexibility and options. Some students, prefer physical textbooks, some want their textbook delivered to their favourite eReader device, and others prefer the familiarity of a PDF or a website.[1]
Here is a brief guide to the different types of document formats that open textbooks are most often available in.
EPUB
EPUB is a standard format for ebooks. Students will need an eReader to use EPUB files. eReaders are available as stand-alone devices (such as a Nook or Kobo reader) and as software packages that students can install on their PC, Mac, tablet, or mobile phone.
There are a number of eReaders available for free, and many have features such as cloud syncing, which allows users to read their book on their tablet, PC, and phone and keep the book in sync. Many also offer annotation and highlighting capabilities.
EPUB is superior to PDF in that the text in EPUB files can shift to fit the size of the device being used to read the book, giving the user a smooth side-to-side reading experience. eReaders also often provide options to resize the text, change the font, or change the colour of the text.
Those who have a Nook, Kobo, or other dedicated eReading device or have downloaded and installed eReader software on their tablet, PC, or mobile device will want to use an EPUB file. Note that Kindle does not support EPUB. Instead Kindle users will want to use the MOBI format (see below).
| Software | Supported Platforms | eReader Device Available | Registration | Open Source |
|---|---|---|---|---|
| Adobe Digital Editions [New Tab] | PC, Mac, Android, iOS | No | No | No |
| Kobo [New Tab] | PC, Mac, Android, iOS | Yes | Yes | No |
| Nook [New Tab] | PC, Mac, Android, iOS | Yes | Yes | No |
| Google Play Books [New Tab] | Android | No | Yes – Google | No |
| iBooks [New Tab] | iOS | No | Yes | No |
| Calibre [New Tab] | PC, Mac, Android, iOS | No | No | Yes |
These are just a few of the many EPUB readers available. Wikipedia has an extensive comparison list of eReaders [New Tab].
MOBI
Students should choose the MOBI format if they have an Amazon Kindle or use the Amazon Kindle software, which anyone can download. Kindle apps and software [New Tab] are available for download on Mac, PC, Android, BlackBerry, Windows OS, and iOS.
Website/HTML
An HTML website is a good format to use to distribute your textbook to students as it is a universal format that does not require any additional software beyond a web browser. HTML is also a good format to distribute your textbook in if you want others to be able to edit or customize your book. If possible, you can create a zip file of your HTML documents and make those available for other instructors to download, edit and host on their own websit