Are you interested in his second book, (Tryptamines I Have Known and Loved)?
Finding a free PDF copy of PiHKAL online raises important legal and ethical questions. Copyright Infringement pihkal pdf free
specifically covering Part 2, containing the synthesis and bioassays of over 200 compounds. Academia.edu : Digital documents of Dr. Alexander Shulgin - Pihkal are hosted here for academic and research use. : Provides a digital index of PiHKAL Part II Are you interested in his second book, (Tryptamines
The history of the on the Shulgin laboratory and its impact on research with the authors' explicit permission
: The chemical synthesis portion of PiHKAL is legally available for free, with the authors' explicit permission, on sites like Erowid.