The divine invasion.

In The Divine Invasion, Philip K. Dick asks: What if God--or a being called Yah--were alive and in exile on a distant planet? How could a second coming succeed against the high technology and finely tuned rationalized evil of the modern police state? The Divine Invasion "blends Judaism, Kabalah, Zoroastrianism, and Christianity into a fascinating fable of human existence" (West Coast Revew of Books).From the Trade Paperback edition.