This new book tells the story of Miguel Perdomo Niera, a healer whose amazing cures during his travels through the northern Andes in the 1860s and 1870s evoked both enormous hostility and widespread adulation. A combination of narrative and analysis, the book documents Perdomo's experiences in Colombia and Ecuador and offers valuable insights into the social history of medicine during the Great Transformation in nineteenth-century Latin America. Perdomo's practice of medicine demonstrated a strong religious influence that liberals thought were incompatible with a modern, secular society. Physicians, formally trained medicos, and those who supported scientific modernization were critical of Perdomo's practice of Hispanic medicine, even though it was part of the medical system of the day. The Tale of Healer Miguel Perdomo Neira is a valuable resource for courses in Latin American history and anthropology, and the history of Andean nations.