I've spent the better part of a week on this issue. I've spoken to 4 different Geniuses and 2 AppleCare techs, I've had my hard drive on my Mac replaced by one genius who swore that was the problem and had my brand new 4S replaced by another who swore THAT was the problem. And a week of hell trying to reload stuff to my computer and phone and the audio books still don't sync. I've tried everything I've tried syncing one tab at a time - just music, then books, then photos, because not only will the audio books not sync, but iTunes stops responding every other attempt. I swear each successive attempt at syncing is getting less scientific and more superstitious - maybe if the phone is on the left of the computer and not the right, upside down, recently rebooted, reboot both computer and phone and then connect........it's insane. I've updated my old 3GS and my sons iPod touch to the new iOS and they still sync perfectly, so it's not the OS, it's something with the phone. So big deal you can't listen to audiobooks, but I own hundreds of them and I listen on my commute, I'm out of ideas of what to try and the Geniuses have no friggin clue either. (I just downloaded the Steve Jobs Autobiography and haven't gotten to listen to IT either.) Am I the only one having this issue? And more importantly what is the solution?????