" PIHKAL is a compelling novel. Given the autobiographical nature of the story, the subject matter - psychedelic biochemistry and sexual chemistry - is daring indeed. PIHKAL is materially long but experientially short, no doubt due to the brisk and vivid writing."  (Marilyn Ferguson - founder of the Brain/Mind Bulletin).

"There has never been a book like PIHKAL, and...we may not soon see another of its kind. No library of psychedelic literature will henceforth be complete without it. Some day in the future, when it may again be acceptable to use chemical tools to study the mind, this book will be a treasure-house, a sort of sorcerer's book of spells, to delight and enchant the psychiatrist / shaman of tomorrow."  (David Nichols, Ph.D. Professor of Medicinal Chemistry, Purdue University).