Megawattage sound systems have blasted the electronically-enhanced riddims and tongue-twisting lyrics of Jamaica's dancehall DJs across the globe. This high-energy raggamuffin music is often dismissed by old-school roots reggae fans as a raucous degeneration of classic Jamaican popular music. In this provocative study of dancehall culture, Cooper offers a sympathetic account of the philosophy of a wide range of dancehall DJs: Shabba Ranks, Lady Saw,...