I do crossfit and Kelly has a pretty strong presence in the community. I honestly thought the book would be as useful as the similar books I had purchased and because it is geared for crossfit enthusiasts, would be overpriced just like everything in crossfit. I WAS WRONG. This book is great. First, let me tell you what it is not, it is not a simple book that will give you a handful of exercises to do every day so your neck and back pain disappear in a week. What this books does have... it has treatments to address specific problems. Even better, there are very detailed pictures that are high quality so you can see exactly what to do. Yes, no more strange stick figures that you are trying to figure out what part of their body corresponds to your body! Beyond that, there are explanations on the sensations you may feel while performing the movements and what that means about your anatomical problem. I did not get this book to learn about how bad sitting at a desk is for me, since my body was already shown me that with pain. However, it does address the causes of all your problems if you are interested in that. I got it for the treatments, which I like a lot. As an FYI, a lot of these exercises require accessories. If you do crossfit they are all at your box, and likely your house. If you do not do crossfit, you may have to shell out $30-$100 depending on how into this you want to get. However, the basic foam roller and lacrosse ball you can buy on amazon have uses far beyond this book (see Youtube)