Lovingly prepared by Joshua Marker along with a devoted team of volunteers, this commemorative publication of PiHKAL: A Chemical Love Story and TiHKAL: The Continuation features the original texts enhanced with complete errata, new essays, anecdotes, and reminiscences by numerous colleagues, previously unpublished photographs, and original art. PiHKAL is the fictionalized autobiographical account of Sasha and Ann Shulgin's research and romance, exploring altered state experiences in the context of intimacy. It describes a wide variety of phenethylamines, their dosage, and their effects. The second volume, TiHKAL, uses the same format as its predecessor to describe the effects of a range of tryptamines, and continues the Shulgin's chemical love story. It also includes appendices that relate to cactus alkaloids, natural beta-carbolines, and drug law. In this edition, each book has been split into two paperback volumes to make a collection of four, housed in a commemorative slipcase set.