I just finished reading this book. It's a personal account of the Chief's life on the plains. Born in 1848 (dying in 1932) he played part in the many wars between the Crow and Sioux, Cheyenne and Arapaho Indians, as well as the wars with the United States. Was well known throughout the tribes as an almost invulnerable warrior.
Well worth your time in reading it. It gives a really good perspective of the life of an Indian warrior. Too often we seem to mix up our modern concepts of living in harmony with nature and what the life of hunter-gatherers is actually like.This gives you a good birds-eye, if brief, view of that lifestyle, at least from the perspective on that tribe's most prestigious warrior.