BNGO Books

Print design and ebook development

Here are terms used in digital and print publishing.
Let us know if you don't find what you need to know and we'll research and add it for you.

ePub
An ePub is the file used by most retailers and reading devices. It contains the entirety of a book — text, images, tables of contents, indexes.

There are two versions in use right now: ePub2 and ePub3. Version 2 is on its way out. Most retailers and reading systems are becoming more and more able to read ePub3. Version 3 includes more stylistic, content, and interactive features. 

mobi
This is the file uploaded to Amazon. It is similar to ePub 3. The background file format contains both KF8 (the most current, used on the Fires and newer Kindles) and Mobi7, which is read by older Kindles.