Three ibooks with different name but ibooks claims they are the same
With iBook Author I've created three iBooks, called 2014-08, 2014-09 and 2014-10. They have different file names and in the inspector properties of the book they are named differently 2014-08 August, 2014-09 September and 2014-10 October. But when I want to add them to the iBooks Library, 2014-09 wants to replace 2014-08 and same for 2014-10. iBooks believes that all three books are the same.
I had startet with book 2014-08. When it grew too big a created with duplicate a spin off and called it 2014-09. When this grew too big I again created a spin off using duplicate and called it 2014-10.
Which property do I need to change in order that iBook considers them as different ?
As I do not know if this concerns iBook or iBook Author I posted only in iBooks Forum.
Thanks
Mac Pro (Late 2013), OS X Yosemite (10.10.1), iBook Author V2.2, iBooks V1.1