Thomas Hatsis is a public speaker, psychedelic community leader, and author of four books in the field of psychedelic history and practice, including The Witches' Ointment. He is also the cofounder of a vibrant psychedelic society, Psanctum, and has the honor of having received the last thirty-four boxes of the Timothy Leary archive to catalogue, digitize, and preserve. He lives in Portland, Oregon.