I'd consider Healing Back Pain: The Mind-Body Connection to be fiction as well. Too long, shouldn't read: if you believe, your back pain will go away. I'm surprised to see the anti-scientific pseudoscience promoted.
There is a drug so powerful that every drug other drug is tested against it: the placebo. If this book saves just one HN reader from opioid addiction then I am glad it made the list.
Don't get me wrong I think the placebo effect is a very useful tool but best to combine it with other methods that work for many back conditions, such as yoga routines that strengthen the back muscles. Of course what works depends on your particular condition which is why anyone with severe back pain should see a medical professional to get advice for their specific problem.