Thanks for your reply. I have only 2 ibooks i bought but 100 of epub books that I converted using Calibre and added to the itune book library, and every sync the damn thing keeps copying those hundred books onto the iPad (the itune status shows copying books, title, size etc...for every book being copied). Unselect the book sync deleted all my books and used the "selected" books only is not what I want. Besides these options I couldnt find any other settings that allow modifying the sync behavior. I would love to be able to selectively chose to backup and to sync each section, for example just sync the app, or only the books etc... Thanks for all pointers, replies.