I purchased the Trigger Point Therapy Workbook about 6 years ago, and now finally feel in a position to recommend that it's not just good, but overwhelmingly good.
I'm 38, I've suffered from Myofascial Pain Syndrome for around 20 years - although it was only about 6 years ago that I finally got this diagnosis that finally explained the terrible constant pain that I'd had in my back, shoulders and neck since late teens. I was initially fairly sceptical about the results it promised, especially as the author seemed to have little or no formal medical training. However, whenever I now say to a physiotherapist, rheumatologist or pain clinician something like "I've read this book and I think maybe the pain in my shoulder is being referred from trigger points in my scalene muscles here", the trained professionals invariably reply "yes, you're right". I'm astonished, and it's so empowering to understand your pain and to have the knowledge to control it.
This book is not for everyone. You will have to study, and get to know the names and locations of muscles. I'm not one of the lucky ones whom this book has helped to become totally pain free. But it is one of the most valuable tools I have to manage my pain, and on some days and with particular types of pain, a quick self-massage of the appropriate area will bring instant relief by as much as 60 or 70%. I've found the information in it to be extremely accurate, and meticulously researched.
If you're serious about helping yourself to manage your chronic pain, buy this book, read it, study it, become an expert on your own pain, it is amazing.