The document summarizes ayahuasca shamanism practices in the Peruvian Amazon based on the author's experiences. It describes a mestizo shaman named Don Juan Tangoa who runs a healing center and school outside Iquitos, Peru, with over 45 years of experience. It explains the beliefs, practices, and ceremonies involving ayahuasca, including the preparation of the herbal brew, its effects, healing processes, diets, and importance of intent.