This book is a wonderful resource. It is great for beginners, practitioners, and instructors and anything in between. This book will give you a deeper understanding of yoga and the principles behind it. It breaks down yoga poses into six sections: standing, sitting, kneeling, prone, and arm supports. It breaks down the material into the interactions of the muscles, joints, and nervous system as well as breathing. This book will help you see the yoga poses in a new way.