TiHKAL is a 1997 book written by Dr Alexander Shulgin and Ann Shulgin about tryptamines.
The full title of the book is Tryptamines I Have Known And Loved: The Continuation. A sequel to PiHKAL, the book was in general received less enthusiastically than its predecesor.
TiHKAL contains analyses on individual mind altering chemicals, separated into chapters, one per chemical, including dosages, synthesis, qualitative comments and analysis of the substance.
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