Today Apple with so many education updates also released an updated version of iTunes 10.5.3 which will allow the sync of interactive iBooks textbooks to your iPad and also presumably to add new features for iBooks 2.0 and updated iTunes U program.
Download iTunes 10.5.3 for Windows and Mac.
What’s new in iTunes 10.5.3
iTunes 10.5.3 allows you to sync interactive iBooks textbooks to your iPad. These Multi-Touch textbooks are available for purchase from the iTunes Store on your Mac or from the iBookstore included with iBooks 2 on your iPad.
iBooks textbooks are created with iBooks Author — now available as a free download on the Mac App Store