I liked Mazza's Book. I was really reluctant to read it because I thought his story has been told many times but i found the book to be a good depiction of the 3rd Colombo war.

Interestingly, when he decided to cooperate, the FBI wasn't too interested because so many Colombo guys have turned informant at the time. What got him a deal was the info he had on Scarpa's FBI connection.