Create interactive multi-touch textbooks
"With iBooks Author, you and your students can fulfill your potential as publishing authors. Not only can you create interactive multi-touch textbooks, but your students can create their own books, included embedded images, movies, audio clips, and links to the Internet. This website will support you in creating books that can be shared and enjoyed on an iPad."
Using the link above, download the ".ibooks" formatted handbook that you can read right on your iPad. (Look under Resources.)
Also, check out this article for 7 reasons to learn "iBooks Author".