For books I would recommend Mafia Dynasty by John H. Davis another good book is Donnie Brasco by Joe Pistone and that Mafia for Dummies(no pun intended) is very informative. As for movies the one Goodfellaoggie is good and I got two DVD box sets from Best Buy called Mafia The Inside Story and La Cosa Nostra The Mafia An Expose. Those are really good.

Leonard: I dont know. See, I have this condition.
Teddy: Well, I hope its not as serious as his, 'cos this guy's dead.