Every day, iconic brands like J.C. Penny, Sears, Kodak, and Blockbuster vanish. As entire lawful industries are disrupted out of existence, how have some organized criminal syndicates endured for nearly a century - despite billions of dollars of law enforcement opposition and ruthless rivals dedicated to their demise?

In Relentless, authors Jerold Zimmerman and Daniel Forrester combine seventy-five years of Nobel Prize-winning economics research with insights from criminal prosecutors to examine how the Sinaloa Cartel, the American Mafia, the Hells Angels, the Crips, and the Bloods survive, and even thrive, whereas legal companies that play by the rules falter and often fail.