I eagerly anticipated this book as I had heard it mentioned as a classic on Ayahuasca and as a good reference point in a number of other books and Ayahuasca and shamanism. The author begins in typical Ayahuasca tourist fashion, and undertakes you on his Amazonian journey with a shaman, partaking in the sacred Yage ceremony. If anything I was a little disappointed with the author’s own experiences and felt that he had perhaps misunderstood his visions a little. I read on, however, and the novel turned into a page-turning thriller. The research done on the twins / dual serpent cosmology myths was fantastic and a revelation to me. It was clear that Narby had done a great deal of research on his hypothesis. I think to anybody studying shamanism, the middle chapters of Narby’s book are essential. As the book moved towards the DNA link with Ayahuasca I was at first sceptical but the author wrote in a convincing manner and I felt that the extremely distant link was well-pointed out and certainly a possibility though I can see the scientists more easily dismissing ‘The Cosmic Serpent’ than perhaps the ancient medicine men who I would imagine would be more open-minded. As an apprentice ayahuasquero myself, who has studied exclusively on my own in the West, I think that there is a lot more to the DNA link than meets the eye. Ayahuasca is a substance which does alter the mind in a tremendous way and I See true possibilities that it is what we call DNA triggering some of the visions. I think the book highlights, not how much we know of science, but how little we know of ancient shamanism. A true understanding of Ayahuasca and the power it harnesses, if well understood could drastically improve our world, if nothing less than to bind Western man back to his natural roots.