Diane Roberts’s nonfiction book Tribal: College Football and the Secret Heart of America tackles the controversies plaguing college athletics, tracing the dubious historical underpinnings of Americans’ most popular sport. In Bestia: Sangre, Lucha y Sueños en el Corazón de las Artes Marciales Mixtas, Doug Merlino brings us a blunt examination of the history, culture, business, and meaning of professional cage fighting.