iBooks Author 1.0 - Create and publish iBooks for iPad.. (Free): "
iBooks Author helps you create and publish amazing Multi-Touch books for iPad.
Now anyone can create stunning iBooks textbooks, cookbooks, history books, picture books, and more for iPad. All you need is an idea and a Mac. Start with one of the Apple-designed templates that feature a wide variety of page layouts. Add your own text and images with drag-and-drop ease. Use Multi-Touch widgets to include interactive photo galleries, movies, Keynote presentations, 3D objects, and more.
Mac OS X 10.7.2 or later
(Via MacUpdate - Mac OS X.)