"Black Robe" by Brian Moore

In "Black Robe" we have the starkly told, straightforward story of a Jesuit missionary in 18th cenury Canada. It has realistic descriptions of the horrors faced by native and European alike. Our eponymous hero has a rough time with, if not a crisis of, faith, as the cultures clash.

I don't know if I would recommend this book. It is told with sparse description, which is perhaps proper given the milieu. There are graphic descriptions of cruelty - torture and death - the brutality that arises when cultures butt heads against each other.