iBooks are not synchronized via iCloud between my Apple devices I don't seem to be able to synchronize my iPad (2) and IPhone (5s) to access the iBooks documents saved across the devices. They are both updated to the latest iOS.  I Have looked into all the settings and they all appear to be OK, but still don't know if I am missing to set the the ones that engages the iBooks. I noted that in the iCloud "settings" I don't see the iBooks icon as I do with the Photos, Mail, Notes, contacts, Calendar, etc., which I manage to see across devices. 

However, I don't find a way for iBooks to add it or for making it into my iCloud Settings screen menu.

Can I kickstart a sync to get iCloud working for iBooks?
Open Settings app on both devices and verify both have an iCloud backup (or connect to iTunes and back up both)
Sign out of iTunes &amp; App Store and then reboot both devices
Sign back in to the iTunes &amp; App store on one device
Open iBooks and see what it shows for your purchases / books.
Tap to download one of each (a purchased book and a synced book)
Then review the iBooks settings in the settings app for this device


Repeat the sign in steps for the second iOS device. Pay attention to the "Sync Collections" setting for iBooks.