We have three user manuals. You can read them here in a web browser or you can download them as eBooks (either Mobi or EPUB) to read on a Kindle, NOOK, iPad, etc. Or, you can purchase them (sometimes for free) at sellers of fine eBooks (Amazon, Apple, B&N, Kobo, Smashwords).
Mobi Machine (Your Kindle Formatting Butler)
Start with this one if you want to make eBooks for the Amazon Kindle.
EPUB Machine (Your EPUB Formatting Butler)
Start with this one if you want to make eBooks for B&N NOOK, Kobo, Apple, etc.
Advanced Mobi and EPUB Machines
Read this only after you have read one of the first two manuals. This shows how to make “camera-ready” PDFs for publishing a printed book through CreateSpace and Amazon. It also contains additional formatting techniques for Mobi and EPUB files.