TIHKAL: The Continuation is a 1997 book written by Alexander Shulgin and Ann Shulgin about a family of psychoactive drugs known as tryptamines. A sequel to PIHKAL: A Chemical Love Story, TIHKAL is an acronym that stands for "Tryptamines I Have Known and Loved".
Cover of TIHKAL, 1st ed.
Alexander Theodore "Sasha" Shulgin was an American medicinal chemist, biochemist, organic chemist, pharmacologist, psychopharmacologist, and author. He is credited with introducing MDMA, commonly known as "ecstasy", via academic journals and papers to psychologists in the late 1970s for psychopharmaceutical use and for the discovery, synthesis and personal bioassay of over 230 psychoactive compounds for their psychedelic and entactogenic potential.
Shulgin (right) with his wife Ann in 2011
Zectran-containing pesticide manufactured by Dow; photo taken at the Farm on July 26, 2009.
Shulgin at the home-based lab on his property, known as "the Farm", 2009