TiHKAL (Tryptamines I Have Known and Loved): The Continuation - TransformPress listing for Shulgin and Perrine’s tryptamine sequel

TiHKAL (Tryptamines I Have Known and Loved) is the continuation of PIHKAL, presented as a second book by Alexander Shulgin and Ann Shulgin. The book blends travel, botanical facts, and scientific speculation with psychological and political commentary, continuing the thematic “chemical love story.” TiHKAL also extends the chemistry section by describing a wide range of tryptamines in a similar format to PIHKAL, and it includes appendices covering topics such as cactus alkaloids, natural beta-carbolines, and current drug law, alongside lists of tryptamines from the literature that may be psychedelic.