The following books and essays are available for free online. Explore the MAPS Store for more books.

Handbook for the Therapeutic Use of Lysergic Acid Diethylamide-25: Individual and Group Procedures

by D.B, Blewett, Ph.D., and N. Chwelos, M.D. (1959)

LSD Psychotherapy (Russian translation) | (Hungarian translation)

by Stanislav Grof, M.D. (original copyright 1980; also available in English at maps.org/store)

Remembrances of LSD Therapy Past

by Betty Grover Eisner, Ph.D. (2002). — PDF | ePub | Mobi

LSD My Problem Child: Reflections on Sacred Drugs, Mysticism and Science

by Albert Hofmann, Ph.D

The Beyond Within: The LSD Story, Including the Past, the Present and the Future of the Drugs that Alter Consciousness and Produce Visions

by Sidney Cohen, M.D. (1964/1967)

Defending Perceptual Diversity in America: Entheogens as Legitimate Contributors to Learning, Health, and Empathy

by Brendan Bombaci (2012)

Drugs & Mysticism: An Analysis of the Relationship between Psychedelic Drugs and Mystical Consciousness

by Walter Norman Pahnke. Ph.D. Thesis, Harvard University. (June 1963) (“The Good Friday Experiment”) Also available as a pdf

Entheogenic Visions

by Stewart Mosher (2012).

The Ethnopharmacology of Ayahuasca

edited by Rafael Guimarães dos Santos (2011). (Also available as individual chapters and in magazine format.)

Guided by the Moon: Shamanism and the Ritual Use of Ayahuasca in the Santo Daime Religion in Brazil.

by Edward McRae, PhD. Courtesy of the Núcleo de Estudos Interdisciplinares sobre Psicoativos (NEIP).

The Sacred Voyage: The Pilgrimage to the Soul

by Lars Faber (2006)

The Yage Drinker

by Fernando Payaguaje. (Donations will be forwarded to Pablo Yepez of the VIHOMA Foundation, who manages a small fund that supports Secoyas in need of medical treatment in Quito, Ecuador.)

Ethnomycological Journals: Sacred Mushroom Studies

by John W. Allen and Prakitsin Sihanonth, Ph.D. (2020)

The Doors of Perception and Heaven and Hell

by Aldous Huxley (1954, 2009)

The Road To Eleusis: Unveiling the Secret of the Mysteries

by Carl A. Ruck, Albert Hofmann, R. Gordon Wasson, Jeremy Bigwood, Jonathan Ott, Carl A. P. Ruck, Huston Smith, and Danny Staples.

Thanatos to Eros, 35 Years of Psychedelic Exploration

by Myron Stolaroff (1994)

Through the Gateway of the Heart : Accounts of Experiences with MDMA and other Empathogenic Substances

edited by Sophia Adamson and Ralph Metzner (1985)