This book is a section by section commentary on Jung's Mysterium Coniunctionis. Alchemy is a confusing topic by itself. Jung's interpretation of it is highly nuanced and can easily be confusing as well. And so one needs someone with the insight and knowledge of an Edward Edinger to lead the reader throught the murky terrain of Jung's text. Edinger is one of those rare authors who is able to be deep and insightful yet clear and concise at the same time. Includes many helpful diagrams, as well as an excellent index.