This manual uses material from The Tibetan Book of the Dead for this preparation. The authors also make an important contribution to the interpretation of The Tibetan Book of the Dead. They show that it is concerned not with the dead, but with the living. The last section of the manual provides instructions for an actual psychedelic session, under adequate safeguards.

The authors were engaged in a program of experiments with LSD and other psychedelic drugs at Harvard University until sensational national publicity unfairly concentrating on student interest in the drugs, led to the suspension of the experiments. Since then, the authors have continued their work without academic auspices.