Hey! I've installed the new OS X Sierra from scratch after backing up all my data of course. All my books and pdf are stored on the cloud so Im fine(I thought I was).. When entering iBooks I am asked if I want to use iCloud storage and I hit Yes. But all my books and PDFs are gone.. Nothing I do they won't return..The library is empty :-(. (if it matter, I use a time capsule to backup everything). And I've just got a new iPhone 7 and tried to get on my iBooks on IOS, but all books are there, stored in the cloud and the option to download them is present..and works just fine. Same goes for my iPad.. The problem with this is that if my iBooks library is empty, I cannot sync my new books on iTunes since it will delete all the books which are already on my idevice.. Any idea how to fix it? I've read many different types of solution for this, but nothing seem to work and the problems are a little different then mine.. Thanks a lot for your help!