Truly a book that only PKD could write. It balances on a knife's edge mundanity and intensity, lucidity and hallucination, Gnostic mysticism and pulp sci-fi. The story is an act of transmutation, as the narrator's intensity of vision leaks out into the world and those around him. These two characters, Horselover Fat and, well, everything else, are a dancing diad, taking turns occupying the positions of sanity and insanity. How the dance ends, with who standing where, is the mystery at the heart of this bizarre story.