The Mexican Mafia is a pioneering work that unveils the operations of this California prison gang and describes how it grew from a small clique into a transnational criminal organization. The Mexican Mafia controls every Hispanic neighborhood in Southern California and is rapidly expanding its influence across the country. Riding a wave of unchecked immigration and seemingly eluding law enforcement, the Mexican Mafia is poised to become the Cosa Nostra of 21st century America.