This is a most unusual book. The author, a professor of anatomy and long-time yoga practitioner, explores, in great detail (when necessary), the human anatomy as it relates to the practice of hatha yoga. For someone such as myself who previously knew *Nothing* about human anatomy, this was a fascinating journey. If nothing else the book will teach you about anatomy, a topic you may previously have had no interest, but in the process it will deepen your knowledge of yoga. Its really well done how the author brings such a seemingly dry, technical subject to life. The author nicely groups the discussion around particular topics as they relate to yoga. For example, there are chapters on the nervous system, on breathing, and on what is happening with your hips and sacrum. Perhaps there are similar books on the market, but I suspect not. I'm reminded of Bill Graham's comment about the Grateful Dead: "They're the best in the world at what they do; they're the only ones in the world who do what they do." I suspect similar comments would apply here. Physically, the book is well produced. Considering the glossy paper used, the price of the book is quite reasonable. The are fantastic anatomic drawings that greatly add to one's understanding. Read this book, and enrich your practice of yoga.