Sasha Shulgin - Plant Origins of the Phenethylamine and Tryptamine Psychedelics

Pihkal: A Chemical Love Story
http://www.goodreads.com/book/show/886113.Pihkal
Tihkal: The Continuation
http://www.goodreads.com/book/show/271921.Tihkal

Alexander "Sasha" Shulgin
https://erowid.org/culture/characters/shulgin_alexander/
Ann Shulgin
https://erowid.org/culture/characters/shulgin_ann/shulgin_ann.shtml