Lots of great research about the negative effects of refined sugars and refined grains. Great behavior modification techniques.
Ignore the suggestions about increased animal protein, which has been shown to increase the risk of cancer, heart disease, osteoporosis, etc. Instead, uses the author's techniques to wean yourself onto whole plant foods.
I once heard that if you can get ONE good idea out of a business book, it's worth the price. With that in mind, I'd say this book is worth its price. It's been revised over the years, but a visit to the website (radiant recovery) suggests not much has changed. I'd love to see a good scientific critique of the science presented here, because the carb impact charts are not carefully presented--not in serving equivalents. But the concepts of brain chemistry are intriguing, and I've been experimenting with the "potato at bedtime" concept and think it might be working. I was already doing everything up to that point. Another good idea is to be mindful of the sugar from fruit--I'd been too free with that. So for me the jury is out, but a couple of good ideas here seem to be making a difference for me.