iTunes does not show nor sync all my books
With the 10.10.5 Yosemite update a strange bug hit my iTunes-iBook. My library library in iBook does not show up completely in iTunes, a substantial number of books are missing and have been deleted from my iPad and it's no longer possible to sync them back. There are some reports on the web but no reports of solutions. Can any one help.
Mac Pro, Mac OS X (10.6.2), 16 GB