Gangsterism as it is (or was),
This review is from: Hit 29: Based on the Killer's Own Account (Paperback)
The book describes the gangsters' world and their business methods. And I think that to the best of Joey's ability (he is a very professional criminal after all) he gives an honest account.
If you have read Steven Brust's Jhereg/Vlad Taltos series, this book may be of interest to you, for Brust has very obviously read it before he created the series. In fact Joey has a walk-on part in one of the books.