The fact that there are lots of helpful images and clear, detailed instruction makes this book worth having. However, I'm not sure about the safety of some of the postures, there are some extreme Asana that are very scary. As a yoga teacher I have concerns for a beginner student trying to follow the sequences in this book, I think that there is potential for harm. Saying that, if you are an experienced practitioner or teacher and are aware of the limitations of the average human body, then many of the sequences are excellent as an all round practice, the author goes into great detail about using the breath to take you through each vinyasa.