For his many devoted readers, Philip K. Dick is not only one of the "one of the most valiant psychological explorers of the 20th century" (The New York Times) but a source of divine revelation. In the riveting style that won accolades for The Adversary, Emmanuel Carrere follows Dick's strange odyssey from his traumatic beginnings in 1928, when his twin sister died in infancy, to his lonely end in 1982, beset by mystical visions of swirling pink light, three-eyed invaders, and messages from the Roman Empire. Drawing on interviews as well as unpublished sources, he vividly...