Also 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

Also 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" https://en.m.wikipedia.org/wiki/TiHKAL#:~:text=TIHKAL%3A%20The%20Continuation%20is%20a,I%20Have%20Known%20and%20Loved%22 https://en.m.wikipedia.org/wiki/TiHKAL#:~:text=TIHKAL%3A%20T....