What is iBooks Author?
iBooks Author is an OS X app for creating media-rich interactive books that can be viewed in iBooks on iPad or Mac. Start with one of the Apple-designed templates, and modify it however you like.
Along with feature-rich writing and layout tools, iBooks Author provides a collection of ready-to-use widgets for adding movies, review questions, image galleries, and other interactive media.
iBooks Author enables you to see how your completed book will look at all times. You can also preview your book on your iPad or Mac at any time.
You can submit your book for publication on the iBooks Store, or export it in a variety of formats and distribute it yourself.