Pain treatment is one of the few areas where a placebo actually 'works' (in the sense that it leads to better outcomes than non-treatment). See Pollo et al, "R

Pain treatment is one of the few areas where a placebo actually 'works' (in the sense that it leads to better outcomes than non-treatment). See Pollo et al, "Response expectancies in placebo analgesia and their clinical relevance." So even if it's full of nonsense, it's not surprising that the book could work (and not just anecdotally). The question is whether this book is any better than a placebo, and anecdotes can't answer that. (I also wonder if it's any better than any other book that would help you cope with psychological stress.)