I was having issues with my shoulder and my doctor had me go to a physical therapist for treatment. He basically gave me one exercise to do, and made it worse. I went back to the doctor and gave me a cortisone injection and also suggested I obtain this book. Unfortunately the injection did not help much, but the exercises in the book has made a difference. The book is very easy to read and very comprehensive in the information you need to understand how your shoulder is designed and made to work. It provides excellent pictures on how to do the exercises and in the order that they should be done. I gave up on the PT, and am using the exercises in the book and seeing significant improvement in my shoulder.
I would recommend this to anyone that is having shoulder issues. I would also like to say that this does not replace a doctor's or physical therapists diagnosis. Once you are evaluated, ask your doctor if he feels you would benefit from this book.
This same author has similar books for the neck, back, knee, etc. I had already owned the neck and back ones, and have since added this one to my library.