As a person that enjoys yoga but is constantly wary of aggravating chronic back pain, this book is a great resource. The book starts with a nice variety of poses spanning a degree of difficulty, prefacing each pose with a disclaimer of conditions that may be adversely affected.
What I liked most were the sequences suggested for treating different health conditions. I have other books listing the different asanas, but they don't offer sequences of poses on one page, and I find myself spending more time flipping through pages to remind myself of the poses than actually practicing yoga.
While I will admit that I myself am skeptical of using specific yoga poses to flush toxins or cure a broken heart (although plenty of people are into this, and that's fine too!), I did enjoy the numerous sequences pictured together and found that they've helped my at-home practice.
Overall, I recommend this book.