A New York Times Bestseller A Boston Globe Bestseller An ABA Indie Bestseller "Black Mass should prompt a reevaluation of the uses and misuses of informers by law enforcement officials throughout the country." --New York Times Book Review "[Shows] how fragile FBI integrity can be when the good guys lose sight of [the] truth, the rules, and the law." --Washington Post Book World "[A] jaw-dropping, true-life tale of how two thugs corrupted the FBI." --Baltimore Sun "Bone-chilling ... one of the best nonfiction reads of the year ... a powerhouse of a book. Dick Lehr and Gerard O'Neill ... write like veteran novelists, weaving scene after jaw-dropping scene into a tapestry of sickening American corruption." --New York Post