Dennis McKenna, PhD, is founder of the McKenna Academy for Natural Philosophy. He is coauthor, with his late brother Terence, of The Invisible Landscape and also Psilycyben: Magic Mushroom Grower's Guide. He is author of Brotherhood of the Screaming Abyss: My Life with Terence McKenna. He is also editor of the two-volume set, Ethnopharmocologic Search for Psychoactive Drugs. His website is https://mckenna.academy/.