This new workout book from Joe Manganiello (actor from True Blood) is pretty incredible.

http://www.amazon.com/Evolution-Cutting-Breaking-Mental-Buil...

He details the workout he used to transform his body for his role of Alcide (a werewolf) on True Blood.

There are also a few chapters dedicated to motivation and mental approach. They're well-written and he doesn't pull any punches. Highly recommended.