Another reviewer has pointed out a variety of mistakes in this book, and people who have read a lot more Mafia books may not find much new or interesting in here. It is of course mostly a self-serving whitewash; Bonanno never mentions the name Don Bolles, the Arizona reporter blown up for looking into Mafia and Bonanno family activity in the area. Nor does he actually admit to any other serious crime.
What I learned from this book is that the Mafia is very much the product of American society and has changed as American society has changed. Bonanno belabors the fact that as Sicilians became Americanized they followed the traditions less. But this was inevitable; the Mafia got established in an environment where immigrants were ignorant and easily intimidated, and law enforcement was very corrupt. The Wagner Act, giving unions real legal status and protection, wasn't passed until the 30's; after that the need for unions to work with gangsters was greatly diminished. The Depression and World War II froze social change for awhile but as people became more sophisticated and mobile the old traditions had less grip on people.