This is an exceptionally well executed yoga anatomy book. It's written by a doctor who practises yoga, and he supported by a very talented digital illustrator. It's a pleasure to read and is pitched at the average person without a medical background who wants to understand what's happening in your body during a yoga posture.
The book introduces the basic terminology and concepts of anatomy and clear simple definitions which sets the stage nicely for more detailed sections which follow (including terms my review is about to use).
Each section discusses a body muscle and its anatomy and function within the context of multiple yoga postures. Multiple illustrations of the muscle in isolation, along with its origin and insertion are provided so that its shape/size are easy to visualise. Then the antagonist and synergist muscles are noted and actions (open chain, closed chain and awakenening) are detailed using yoga postures to visually convey what is happening. There is identification of when the muscle is being stretched and contracted. Some discussion of innervation and chakra illumination is also provided. I found the information very easy to understand and absorb because of the high quality and number of illustrations.
Although the cost of the book is fairly steep I'm glad I have it in my library as the quality is good enough that it seems like value for money.
Personally I think this book is pitched at exactly the right level, but if you want exceptionally fine detail on what's happening in each yoga pose anatomically you may prefer Yoga Anatomy by Leslie Kamoniff instead of, or in addition, to this book.