Mastery Books (Post Big Bang)

I remember somewhere it was mentioned that when the Dark Knight's Hex (Or was it Aura?) skill was changed that there would be new skill books, so it looks like they would still be around (Not 100% sure on this one).

EDIT:

Also, skill balancing stuff is coming.... looks like they changed a lot of stuff. One of the first things I noticed was that they added mastery books for Hex of the Beholder, Aura of the Beholder, and Bahamut. Also, a lot of new skill icons were added.

From: http://www.southperry.net/showthread.php?t=28392

Looks like mastery books are staying then, but may be changed or not at all.