If it's entertainment you want then Dave Courtney's books are certainly readable even though they are a little exagerated in my opinion but still very readable (i see you have read some Chopper books so you are no stranger to exagerations).

Rise of the Foot Soldier by Carlton Leach is also not bad. At the moment i am reading Brown Bread Fred by Freddie Foreman which is a good eye opener and clarifies a few myths from the past.