I have both an iPad and an iPhone, and I sync them both with the same computer. I read a lot of ebooks, and I keep them in iBooks, so that I can switch between all my devices. (I also have a number of audiobooks, which I only use from my phone or laptop, never from the iPad).
I have all my devices set to automatically sync all books. But for a while now, when I've synced the iPad, it's reset itself to sync "Selected books" instead of "All books", so that I've had to go back to iTunes and re-select "All books" and do a second sync in order to get all of my books transferred.
This only happens with the iPad, not with the iPhone. I've had this iPad for a while; I don't recall having had the issue the whole time, but I also don't recall exactly when it started or if I did something to cause it.
I have tried doing a complete reset and reinstall of the iPad, but the problem came back as soon as I'd done my first sync.
Is there any way I can make iTunes stop resetting my book sync preferences?