Rochester, VT: Park Street Press, (2009). First edition - An account of almost half a century of pioneering research in the Amazon and Peru by this noted anthropologist studying hallucinogens, including ayahuasca. Although the Harvard ethnobotanist Richard Evans Schultes was credited in the early 1950s as being the first to document the use of ayahuasca, other researchers, including de Rios, were responsible for furthering his findings and uncovering the curative capabilities of this compound. Illustrated with photographs, including some in full color. Glossary, list of publications by de Rios, bibliography, index. xvi, 190 pp. ISBN: 9781594773136.