Of the eighty pages of this book, twenty are dedicated to technical aspects of how to make incense, which might be of interest to perfumiers, but is not what a magician buying this book will want to read. Sure, perfume and incense have applications in magic, but they simply are not discussed in this book; what's discussed is the process of getting ingredients, mixing them and making incense.Another chapter is a boring political rant of no relevance.Ray Sherwin's methods of identifying and exorcising personal demons are of value, but - in a mindboggling piece of bad editing - are split between the first chapter and the tenth. Five or six pages from the first chapter are repeated verbatim in the tenth! Was this book never proofread at all?!All in all, a bad book.