From Friday the 13th movies to pro wrestling, from Stephen King novels to heavy metal music videos--violent imagery saturates our popular culture, reaping enormous profits for its creators, provoking outrage in its critics, and drawing squeals of delight from its consumers. Why do these entertainments find such huge audiences? Seeking to understand the phenomenon, rather than to condemn or defend it, James B. Twitchell offers a lively look at some...