If Tenet does come out with a book, I'm thinking it'll be more anti-Clinton than anyone else. Clinton treated him with disdain.
Another side could be... maybe it is just that Tenet had told Bush of the book he had already written. The book explains what happened during the Clinton years.
By agreement they decide he (Tenet) should leave now to publish it.
Maybe too wishful thinking.... but wouldn't that be nice.