Crackling with sexual tension, comic flourishes, macabre drama, and science fiction clichés, rock posters are as vibrant and varied as the music they celebrate--and more popular today than ever. With imagery that ranges from eye-popping and crassly outrageous to subtle and esoteric, these graphic manifestos of rock rebellion have matured into a full-blown phenomenon, four decades after the first great wave of rock art roared out of San Francisco in...