How do I transfer my iBooks from my old iPad to my new iPad?
I tried using iCloud to do this by syncing the books through the iCloud drive, however only a couple of my books have been transferred this way. I have quite a large collection, so it would take a very long time to transfer the books by email. Also, these books have not been purchased through iTunes.
Also for reference, my old iPad is the iPad 3rd gen and the new one is the iPad Air 3rd gen
iPad Air 3 Wi-Fi