Marlene Dobkin de Rios is a medical anthropologist who has conducted fieldwork in the Peruvian Amazon and the coast on plant hallucinogens and healing. She is Associate Clinical Professor of Psychiatry and Human Behavior at the University of California, Irvine, and Professor Emerita of Anthropology at California State University, Fullerton. De Rios has spearheaded research on the plant hallucinogen ayahuasca in Peru, Brazil, and the United States. The author of six books and several hundred articles on hallucinogens and culture, she resides in Sourthern California.

Roger Rumrrill is a well-known Peruvian journalist and author of 25 books. He is a recognized expert on Amazon themes, including narco-trafficking, biological wealth of the Amazon, and social and cultural issues of indigenous peoples in Peru and other regions of Latin America.