A new theory of Hermetic Magick, suitable for the 21st Century. For many ritual magicians Aleister Crowley's theory of magick is a cornerstone of their practice. However, Crowley was writing in the 1920s and a lot of the cultural assumptions that he made no longer apply. What is needed is a new approach to magick which is suitable for a modern audience and takes into account the social, scientific and philosophical changes which have occured over the past century. This book is an attempt to do just that. It discusses modern magick in relation to the New Age movement, Neo-paganism and modern cultural and scientific theory and shows how advances in our understanding of the brain reveals how magick works in neurological terms. The author is a Hermetic magician and Thelemite with over thirty years of experience in the field. He has run study courses in his home town and given numerous talks at conferences around the UK. This book is suitable for Thelemites and magicians who want to deepen their understanding of modern magick as well as all those who are wondering if magickal thought is still relevant in the modern world. May it sustain you in your search for the QUINTESSENCE, the Stone of the Philosophers, True Wisdom, Perfect Happiness, the SUMMUM BONUM.