The Divine Invasion by Philip K. Dick

I'm not spoiling the plot for you here--only telling you things you'll find out in the first few pages: this book's about God coming back to take His Planet (yes: Earth) back. Earth is split up between two world powers: The Catholic Church and The Communist Party. Both camps are run by corrupt assholes. And both see God as a Malignant Alien Lifeform. So God has to plant himself in the uterus of an unwilling (virgin) woman who's depressed and living alone in an igloo on one of the many planets that humans are slowly colonizing. Being depressed, sick, and now pregnant with God (who talks to her), she takes a trip back to Earth, slips in past the Catholic & Communist Interplanetary Customs folks with God hidden inside her, and promptly dies, but not before God gets out of her as a prematurely born baby. He then sets about having to grow up, from starting point of helpless baby, into the full-grown human version of God, whereupon he plans to kick Satan's (aka Belial) ass and burn up every ungrateful human bastard on the planet. But, being a baby, and being that the Catholics and Commies are trying to find this evil alien with a Messiah complex, he needs some help. That's where you're at around Page 3; the rest of the book is the rest of the story. I thoroughly enjoyed it. There's a lot of arguing amongst God and his fellows as to whether or not it's worth saving anyone on Earth. Also some arguing about whether God has any claim to a moral high ground over Belial, being that God created this planet, and plenty of humans are miserable and do miserable things to the planet and each other. .