Good work MrIbis
Other than those three great reads, here is a list of some books I have enjoyed reading over the years. In no particular order...
The Botany and Chemistry of Hallucinogens - Albert Hofmann
Complete Guide to Prescription and Nonprescription Drugs - H. Winter Griffith & Stephen Moore
Consumer's Guide to Psychiatric Drugs - John D. Preston, John H. O'Neal, Mary C. Talaga
LSD, My Problem Child - Albert Hofmann
Marijuana Horticulture: The Indoor/Outdoor Medical Grower's Bible - Jorge Cervantes
DMT:The Spirit Molecule - Rick Strassman
The Doors of Perception Heaven and Hell - Aldous Huxley
Ecstasy: Dance, Trance & Transformation - Nicholas Saunders, Rick Doblin
Plants of the Gods: Their Sacred, Healing and Hallucinogenic Powers - Richard Evans Schultes, Albert Hofmann
Essential Substances: A Cultural History Of Intoxicants In Society - Richard Rudgley
Flashbacks, A Personal and Cultural History of an Era - Timothy Leary & William S. Burroughs
Plants of the Gods: Their Sacred, Healing and Hallucinogenic Powers - Richard Evans Schultes, Albert Hofmann
Food of the Gods: The Search for the Original Tree of Knowledge : A Radical History of Plants, Drugs, and Human Evolution - Terrence Mckenna
Psychedelics Encyclopedia - Peter Stafford
The Sacred Mushroom Seeker - Thomas J. Riedlinger, editor, Terrence McKenna, Peter T. Furst
Marijuana Grower's Handbook: Your Complete Guide for Medical and Personal Marijuana Cultivation - Ed Rosenthal
The Salvia Divinorum Grower's Guide - Socied Para La Preservation De Las Plantas Del Misterio
From Chocolate To Morphine, Everything You Need to Know About Mind-Altering Drugs - Dr. Andrew Weil and Winifred Rosen
Psilocybin - Magic Mushroom Grower's Guide
Psychedelic Drugs Reconsidered - Lester Grinspoon & James B. Bakalar
Laughing Gas, Nitrous Oxide - Michael Shedlin and David Wallechinsky
Pharmacotheon - Jonathan Ott
Little Book of Heroin - Francis Moraes
Psychedelic Chemistry - Michael Valentine Smith (this one is only really for the chemistry lovers out there)
Peyote and Other Psychoactive Cacti - Adam Gottlieb
LSD Psychotherapy - Stanislav Grof
Little Book of Ketamine - Kit Kelly
The Politics of Ecstasy - Timothy Leary
Persephone's Quest: Entheogens and the Origins of Religion - R. Gordon Wasson, Stella Kramrisch, Jonathan Ott, Carl A.P. Ruck
Sex Drugs and Aphrodisiacs - Adam Gottlieb
True Hallucinations - Terence McKenna
The Magical and Ritual Use of Aphrodisiacs - Richard Alan Miller
Mushrooms and Mankind: The Impact of Mushrooms on Human Consciousness and Religion - James Arthur
Turn On, Tune In, Drop Out - Timothy Leary
Magic Mushrooms of The World - Paul Stamets
On the Bus: Ken Kesey and the Merry Pranksters - Paul Perry, Michael Schwartz
The World Is As You Dream It: Shamanic Teachings From The Amazon And Andes - John Perkins
Opium for the Masses: A Practical Guide to Growing Poppies and Making Opium - Jim Hogshire
People of the Peyote: Huichol Indian History, Religion & Survival - Stacy Schaefer & Peter Furs
Altered State : The Story of Ecstasy Culture and Acid House - Matthew Collin, John Godfrey
One Flew Over the Cuckoo's Nest - Ken Kesey
Ayahuasca Visions - Pablo Amaringo
I'm sure I have missed a few and will add them when I think of them