Take a look at the video recently posted by Apple. It shows how to make a multi-touch iBook with iBooks Author.

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. Preview your book on your iPad at any time. Then submit your finished work to the iBookstore with a few simple steps.

More information about iBooks Author for Mac can be found here ^[1].