The books in question are "Killing Jesus" and "Killing Reagan". Full disclosure: The books haven't been totally banned yet, tbey've been "removed pending further review". But Bill-O is furiously indignant that it's even gone that far.
Hmm... I didn't look up exactly which books were removed. I've heard that his histories are mostly made up, but I didn't expect them to be challenged just for that.
I've heard the Reagan book may have some juicy stuff about Ronald and Nancy's pre-politics Hollywood lives...and as for Jesus, there's that rumoured fling with Mary Magdalene...