Apple has created an iPad iBooks app (it's expected to work on iPhones and Macs soon) as a new way to read and buy books.
The app can be easily downloaded from the App Store (it's free), and you can buy a wide variety of books from classics to bestsellers, all from with in the new iBookstore (independent titles and iBooks are also being published at Jims Post as well as other self-publishing sources). After you’ve buy an iBook, you can drop it into itunes so it’s displayed on your iPad Bookshelf. Then to read it, all you have to do is tap on it and it opens the digital pages. The iPad's crystal clear LED-backlit screen displays the pages in vivid color, so even in low light it's easy to read.
Also, Apple engineers have found a way to deliver 10 hours of battery life, so iPad readers have an extended experience. There's never been a better time to publish to iPads. iPad publishing can get your teaching material, novel, film, documentary, or video to new audiences around the world.