Earlier today, Apple released the iTunes 10.5.3 software update to both Windows and Mac OS X users, adding support for syncing iBooks textbooks to an iPad from a computer. 

The full release notes for the update is below:

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

For information on the security content of this update, please visit:support.apple.com/kb/HT1222

At an event in New York City earlier today, Apple unveiled iBooks 2 and iBooks textbooks, which are more interactive and intuitive books for students in college. The company also released a new iTunes U app for iOS devices.