All right, so I'm extremely skeptical of this sort of thing, and I don't actually thing she's right. Well, not in the extreme she takes it, however. I really don't think everyone who gets hurt or sick in any way whatsoever can cure it through positive thinking.
*However*. I do think there's a part of this that is right and helpful. I think that our way of thinking has much more power than we think (as evidenced by the placebo effect, among other things). I really enjoyed all the exercises she has in this book (I love books with exercises to do in general), and I really think they have helped me. So, 4 stars it is!