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• Tihkal: The Continuation (1997) with Alexander T. Shulgin
  Tryptamines I Have Known And Loved

• Pihkal: A Chemical Love Story (1991) with Alexander T. Shulgin
  Phenethylamines I Have Known And Loved

See also:

• Higher Wisdom: Eminent Elders Explore The Continuing Impact Of Psychedelics (2005), Charles S. Grob and Roger Walsh, eds.
  Psychedelics have been a part—often a central and sacred part—of most societies throughout history, and for half a century psychedelics have rumbled through the Western world, seeding a subculture, titillating the media, fascinating youth, terrifying parents, enraging politicians, and intriguing researchers. Not surprisingly, these curious chemicals fascinated some of the foremost thinkers of the twentieth century, fourteen of whom were interviewed for this book. Because no further human research can be done, these researchers constitute an irreplaceable resource. Higher Wisdom offers their fascinating anecdotes, invaluable knowledge, and hard-won wisdom—the culmination of fifty years of research and reflection on one of the most intriguing and challenging topics of our time.  Includes interviews with Albert Hofmann, Alexander T. Shulgin, Ann Shulgin, Betty Eisner, Gary Fisher, Huston Smith, James Fadiman, Laura Archera Huxley, Michael Harner, Myron J. Stolaroff, Peter T. Furst, Ram Dass, Stanislav Grof, and Zalman Schachter-Shalomi

• Entheogens and the Future of Religion (1997),  Robert Forte, ed.
  Exciting book on the spiritual benefits of the entheogens, especially to our society. Essays by Albert Hofmann, Alexander Shulgin, Ann Shulgin, Dale Pendell, Eric Sterling, Jack Kornfield, R. Gordon Wasson, Rick J. Strassman, Robert Jesse, Terence McKenna, Thomas Riedlinger, and Thomas B. Roberts.

See also: Alexander T. Shulgin (Husband).