What is VALIS? This question is at the heart of Philip K. Dick's [...] first book in his defining trilogy. When a beam of pink light begins giving a schizophrenic man named Horselover Fat (who just might also be known as Philip K. Dick) visions of an alternate Earth where the Roman Empire still reigns, he must decide whether he is crazy, or whether a godlike entity is showing him the true nature of the world.