I actually learned about the book here on HN: I'm usually a very skeptical person, but enough self-proclaimed skeptics (who were embarrassed to admit they even read it) claimed success with it that I decided to check it out.
I highly recommend reading it (with an open mind) if you're suffering from a chronic ailment that lacks an obvious physical cause. I used it for chronic pain, but the author claims success with just about any other type of "catch-all" diagnosis that doctors make when they're stumped, like IBD.
BTW: the doctor is an American psychiatrist with a long career, so it's not your usual alternative medical book. But I consider it "alternative medicine" in that it's based on similar principles as some other alternative medicines and the theory does not seem to have any sort of acceptance in the western medical community. (The author cites his evidence, and provides his explanation for why the medical community rejects that sort of evidence.)