So I had an older iPad Mini that I synced with my iMac. No big deal, I had had some ePub books that were synced over on my iPad Mini and I could see them in iBooks. This weekend I upgraded to an iPad Air 2 and did a restore from my iTunes. Most everything came across and it works quite well...except my books did not. Weird. So I went into iTunes, dragged the lot of my books over and synced. I look on iTunes and my new iPad is showing them (when I look in iTunes), but they're not showing on the device itself in iBooks. Remove them and sync again. This time I have iBooks open on my new iPad Air 2. As each book syncs, I can see each of them populate into iBooks for just a moment and IMMEDIATELY they disappear from iBooks. I check my iTunes and it tells me my books are on my iPad. I just can't see them. The books are ePub, and are showing correctly (with icon) in my library on my iTunes. In my iTunes, it also shows correctly (with the right icons) on my iPad. But they are nowhere to be found in iBooks actually on my new iPad Air 2. However they are showing in iBooks on my old iPad Mini. Both iPads are currently up to date with the current version of iOS (iOS 9.1). Help?