Bourke's contacts with Indians brought a growing interest in their lifeways and ceremonies. Ranging from Texas and Mexico north through Hopi and Zuni lands to Montana, Idaho, and the Rockies, Bourke observed and made extensive field notes. The Apaches began calling him "Paper Medicine Man." To the Sioux he was "Ink Man."
Bourke began publishing his observations and quickly developed a reputation as an accurate reporter of American Indian customs and rituals, earning praise from John Wesley Powell, Theodore Roosevelt, Francis Parkman, and Sigmund Freud. Bourke also wrote firsthand military history, chronicling Crook's exploits in the classic On the Border with Crook, which established him as one of the first historians of the Indian Wars.
Based on prodigious research and drawing on Bourke's voluminous diary, Paper Medicine Man is an adventure in itself.