Under the Banner of Heaven by Jon Krakauer
Truth can be so much harder hitting than fiction. The book refers to itself as "A Story of Violent Faith" and it tells the story of the darker side of religious life here in
Everyone in Christian circles gets all in a bunch over spiritual relativism (the idea that everyone has their own path and no pursuit is more or less valuable). Walter Brueggemann does an interesting talk where he puts forth the notion that absolutism is no less harmful. Absolutism, he says, invariably leads to denial. Reading this book, you can see the ultimate destination of absolutism. When self reflection stops, when one can no longer look critically at one's own theology and philosophy; suffering is the outcome.