This Classic book has been updated to include perception exercises that readers can take as they read the text. The Doors of Perception is a philosophical essay, released as a book, by Aldous Huxley. First published in 1954, it details his experiences when taking mescaline. The book takes the form of Huxley's recollection of a mescaline trip that took place over the course of an afternoon in May 1953.