American Desert - Percival Everett

Theodore Street is driving towards the ocean, where he plans to drown himself. But on the way he is hit by a van and sails through the windscreen, his head sliced cleanly from his body. At his funeral days later, he sits up in his coffin, apparently resurrected. Alternately fêted and feared as the Second Coming and the Anti-Christ, Theodore becomes an object of derision and morbid curiosity to the press, a prized specimen for scientists, and Satan incarnate to an obscure religious cult deep in the desert.