This Commemorative edition of PiHKAL: A Chemical Love Story and TiHKAL: The Continuation features the original texts but with complete errata, new essays, anecdotes & reminiscences by numerous colleagues, over 200 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 Pihkal 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 to make a collection of four books. The set, housed in a beautiful slipcase, includes: PiHKAL: The Love Story PiHKAL: The Chemical Story TiHKAL: The Story Continues TiHKAL: The Chemistry Continues.