The Psychedelic Experience: A Manual Based on the Tibetan Book of the Dead (Penguin Modern Classics) - Softcover

Timothy Leary was one of the most famous countercultural icons of the 1960s. Labelled as the 'Most Dangerous Man in America', Leary had many run-ins with the law and served several prison sentences. He dies in 1996; the following year seven grams of his ashes were launched into space aboard a Pegasus rocket.

Ralph Metzner is a professor of psychology at the California Institute for Integral Studies and president of the Green earth Foundation.

RICHARD ALPERT is a former professor who conducted controversial LSD experiments with Leary at Harvard. He is considered one of the most important spiritual teachers of the 20th century.