Message: "Make sure the disk containing your library is connected, then click Try Again. Library Location: (null) You can also reset your library, then sign into view and re-download your purchased books."
But reset button does nothing.
MacOs 10.14.6
MacBook
Solved it!
System Preferences -> iCloud -> iCloud Drive -> Options -> Books.App - deselect
Restart Mac
System Preferences -> iCloud -> iCloud Drive -> Options -> Books.App - select
Then Books opens OK and syncs with Books on iPad and iPhone
Solved it!
System Preferences -> iCloud -> iCloud Drive -> Options -> Books.App - deselect
Restart Mac
System Preferences -> iCloud -> iCloud Drive -> Options -> Books.App - select
Then Books opens OK and syncs with Books on iPad and iPhone
Apple Books can't access your library
