The New England Mafia was a hugely powerful organization that survived by using violence to ruthlessly crush anyone that threatened it, or its lucrative gambling, loansharking, bootlegging and other enterprises and psychopathic strongman Joseph "The Animal" Barboza was one of the most feared mob enforcers of all time, killing as many as thirty people for business and pleasure.

From information based on newly declassified documents and the use of underworld sources, Boston Mob spans the gutters and alleyways of East Boston, Providence and Charlestown to the halls of Congress in...