So, this book is generally a good, if a little paradoxical, introduction to yoga. Let me explain why.
It consists of two parts: the rather non-threatening, systematic, effective introduction to the history, ethical precepts, and health benefits of yoga, as well as an introduction to relaxation, meditation, and diet. I found these to be effective, containing pared-down information for beginners while conveying what is most important.
Some things to know: the book focuses on Sivananda Yoga, which is not your typical yoga flow. In this type of yoga, you are supposed to rest after or between sequences of poses to help relax the nervous system. The diet section advises removing meat and eggs from your diet, but not milk.
Then we get to the yoga poses section (which is technically nestled in the middle of the book). This section shows not only sun salutations but also a mix of simple and surprisingly difficult asanas, presented in all variations, from preparatory versions to very intimidating advanced versions. There are effective explanations; however, you can now find internet posts written by the male model in this book discussing his multiple injuries from yoga and advising people not to practice it. This is something one should keep in mind when looking at the more extreme versions of poses.