Joey the Hitman: The Autobiography of a Mafia Killer by "Joey Black" and David Fisher. I had heard about this for a while now but was skeptical until I saw the interview with him on youtube. Like the interview, this book comes across as realistic, but you can't be 100% sure. He seems to have been involved in too many rackets and knew too many mobsters for me to totally buy it. Having said that, a report came out after his death proving he was a real gangster and the book gives a good breakdown of a lot of different rackets the mob was involved in up to the early 70s. Check it out if you can get a cheap price.