Aldous Huxley, one of the most daring intellectuals of our time, collects in this book two articles about hallucinogenic drugs and their influence on various artistic manifestations, from painting to literature. Through the documentation available in the 1950s and the testimony of doctors and scientists who had experimented with drugs, Huxley recounted the history of peyotl, its social consideration in old American cultures, and recounted his own experiences with hallucinogens. A fundamental work in the debate on drugs.