Available on Amazon and in all good bookshops

“In this fascinating and provocative book, Simon G. Powell speculates on the nature of reality. He posits that Nature is a deliberate and intelligently behaving system, and he proposes that psilocybin, by altering the neurochemistry of the brain in specific ways, enables novel patterns of information to emerge, allowing the psyche to become a sort of conduit to the Other. If in fact that is what actually happens, then entheogens (psychedelics) are much more important to the human species than has been realized.” 
David E. Nichols, Ph.D.,  president and cofounder of the  Heffter Research Institute

“Simon G. Powell has become a cogent proselytiser for mushrooms as our ecological redeemers.”
From Andy Letcher’s book Shroom

“This book provides a clear and up-to-date picture of what goes on in the brain during the visionary psilocybin experience, and comes tantalizingly close to the bridge linking mind to matter. Those interested in consciousness and its modification will gain from reading it. The author’s intrepid speculations, centering on information as the fundamental stuff of the universe, are clearly signposted. The writing is lucid and a joy to behold. An important contribution.”
Jeremy Narby, Ph.D., author of The Cosmic Serpent and Intelligence in Nature

“A worthy successor to Aldous Huxley’s “TheDoors of Perception“, Powell takes the reader behind the grand curtain of reality with a compelling hypothesis that approaches a unified field theory of human consciousness in an intelligent and interconnected universe.”
Bill Linton, CEO of Promega and a Director of the Heffter Research Institute

“Simon G. Powell has crafted a magnificent, multifaceted argument for the reintegration of psychedelics into science, culture, psychotherapy and religion, to inspire our unbalanced species before we push the biosphere into total decline.”
Rick Doblin, Ph.D., president of the Multidisciplinary Association for Psychedelic Studies

“I was simply blown away by this extraordinary book. Hands down, it’s the best argument that I’ve ever read about the possibility of teleology operating in evolution, and of a higher intelligence organizing the natural world.”
author David J. Brown
 
“All in all, this is a stimulating and revolutionary volume, whatever your take on “chemically induced theophany.”” 
Mac Graham, Whole Life Times, December 2011 

Interesting review here: http://www.realitysandwich.com/mushroom_gnosis