iA dazzling work of personal travelogue and cultural criticism that ranges from the primitive to the postmodern in a quest for the promise and meaning of the psychedelic experience. piWhile psychedelics of all sorts are demonized in America today, the visionary compounds found in plants are the spiritual sacraments of tribal cultures around the world. From the iboga of the Bwiti in Gabon, to the Mazatecs of Mexico, these plants are sacred because they awaken the mind to other levels of awareness--to a holographic vision of the universe. piBreaking Open the Headi is a passionate, multilayered, and sometimes rashly personal inquiry into this deep division. On one level, Daniel Pinchbeck tells the story of the encounters between the modern consciousness of the West and these sacramental substances, including such thinkers as Allen Ginsberg, Antonin Artaud, Walter Benjamin, and Terence McKenna, and a new underground of present-day ethnobotanists, chemists, psychonauts, and philosophers. It