The Cosmic Serpent

Intelligence in Nature

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The Fellowship of the River: A Medical Doctor's Exploration into Traditional Amazonian Plant Medicine

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Breaking Open the Head: A Psychedelic Journey into the Heart of Contemporary Shamanism

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The Shaman and Ayahuasca: Journeys to Sacred Realms

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Listening to Ayahuasca: New Hope for Depression, Addiction, PTSD, and Anxiety

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DMT: The Spirit Molecule: A Doctor's Revolutionary Research into the Biology of Near-Death and Mystical Experiences

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Supernatural: Meetings with the Ancient Teachers of Mankind

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Ecstasy: The Complete Guide: A Comprehensive Look at the Risks and Benefits of MDMA

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