Books about Indians of South America -- Amazon River Valley

The North-West Amazons: Notes of some months spent among cannibal tribes

Travels on the Amazon

A narrative of travels on the Amazon and Rio Negro, : with an account of the native tribes, and observations on the climate, geology, and natural history of the Amazon valley

Unter Wilden am Amazonas : Forschungen und Abenteuer bei Kopfjägern und Menschenfressern (German)