Mob Nemesis:

While J. Edgar Hoover was denying that there was such a thing as organized crime, in the forties, fifties, and sixties the mob was busy forming powerful syndicates in most of our large industrial cities. This book tells the fascinating, first-hand story of how FBI Special Agent Joe Griffin, with the help of a team of courageous professionals, succeeded through dogged determination and uncanny street smarts, in convicting major La Cosa Nostra leaders in Buffalo, Cleveland, Rochester, and Youngstown.

Forget Hollywood's version of the mafia; this is the real inside story. All the more fascinating because it's true, Mob Nemesis is an engrossing story of the underworld from a man who took them on and won.