It took me about five minutes worth of reading The Divine Invasion and a serious bout of deja-vu to realize that I had, in fact, read the book years before. The second book in Philip K. Dick's gnostic trilogy (for lack of a better descriptor) is a continuation of the themes of the first book, VALIS, but set far in the future. Now I recall reading it (admittedly out of order because the subject was really interesting to me, and VALIS was not) and I remember being pretty confused about the whole thing. Surprise, surprise that actually reading the books in order (shocker) sheds some helpful light on the rather complex religious themes.
In a nutshell, The Divine Invasion is what it sounds like: "God" was kicked off the planet around 73 AD and has been living on a mountain on a distant planet. Now, he wants to come back to Earth, which is heavily influenced by his adversary. His attempt to come back in the womb of a virgin succeeds, but evil forces caused her shuttle to explode. He survived, but is brain damaged. I can't imagine this book going over well in the midwest, not to pick on a particular part of the country. For me, however, it puts a spring in my type and I chuckle aloud at the outrageous, unique, and clever audacity of the book.