The book "The Psychedelic Experience" is unique in a sense. Its authors - three Harvard professors, Ralph Metzner, Richard Alpert and Timothy Leary - unveiled a completely original view of the psychedelic problem and the problem of personal transformation. It was they who became the pioneers of the “psychedelic revolution” and stood at the origins of a new, transpersonal direction in psychology. According to the authors of the book, the psychedelic drug is only one component of a psychedelic session. Psychological and moral preparation both before and after taking the drug are no less important. The authors believe that for such preparation there is no need to invent something new. For this purpose, you can successfully use the existing classical literature on meditation. This guide is based on material from the Tibetan Book of the Dead. The authors made significant contributions to the interpretation of the ancient text. They showed that this book was not intended for the dead, but for the living. The final section of this manual provides instructions that, with appropriate precautions, can be used in modern psychedelic practice.