Non-fiction

(1989). The Secret Life of Plants.

(1972). Flesh of the Gods: The Ritual Use of Hallucinogens.

(1992). Psychedelics Encyclopedia.

(1997). The Long Trip: A Prehistory of Psychedelia.

(1984). Bolo Bolo.

(1993). The Incas and Their Ancestors: The Archaeology of Peru.

(1994). Mexico: From the Olmecs to the Aztecs (Ancient Peoples and Places).

(1993). The Maya (Ancient Peoples and Places).

(1989). Cows, Pigs, Wars, and Witches : The Riddles of Culture.

(1986). Acid Dreams: The Complete Social History of LSD: The CIA, the Sixties, and Beyond.

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