A Maze of Death by Philip K. Dick

I just finished this book. Liked it a lot, so much it is now my favourite PKD (I've read Ubik, Do androis, and the 3 Stigmata). I might change my mind later, who knows, but the impact it's had on me won't change. It's a story of colonisation. It got me hooked on the third page when it introduced religious themes, particularly a character reading this from a religious book: "God is not supernatural. His existence was the first and most natural mode of being to form itself." The story is not about religion, but religion is part of some sort of guiding principle the characters follow or believe in. That, and the final twist, which transforms the story in a different kind of story and leaves you having existential thoughts.