At Play in the Fields of the Lord Author:Peter Matthiessen Two American soldiers-of-fortune and four fundamentalist missionaries meet the Amazon "savage" Niaruna tribe; they each learn new ways to view life, the world, and each other.
This is one of the best books I have EVER read. Evangelical missionaries go into the jungle to save a savage Indian tribe. The local government is corrupt and there are mercenaries in the mix. I feel like I was there with them!