Hello,
On Mac OS El Capitan 10.11.6, PDF added to iBooks v1.5 will not show up in iTunes 12.4.3.1. Therefore, I can't find a way to sync the PDF's to my iPhone.
I've checked that iBooks is on on iCloud Drive. I've tried the safe mode as well. No chance.
Your help will be greatly appreciated.
Thanks,
Pierre-Yves
iTunes, OS X El Capitan (10.11.6)