I haven't read the book or heard of it, but I don't actually have PCOS either. If I do, its an extremely severe case that hasn't responded well to most of the traditional medications. In any case, I've changed my life-style. Bascially my biggest change was adding a whole lot more exercise and giving up regular soda. The latter has become much easier with Splenda and finding soda that doesn't have nutra-sweet in it.
I do balance what I eat, but mostly I watch calories and fat. I do buy a lot of low-carb products, and don't eat very many white things anymore. I even buy whole-wheat macaroni for macaroni and cheese! Which is made with no-fat/low-fat margarine and the Carb Countdown milk! Try figuring out THAT calorie count!
But, I've already given up so much because in addiiton to the hormones that don't cooperate when you have PCOS, I also have digestive issues. So I can't eat chicken, and chicken or chicken products are in EVERYTHING!!!!

I'm getting used to it at this point, but I refuse to give up everything. I'd already been buying things like frozen yogurt, but now my favorite ice cream company uses Splenda in their sugar free products, so I buy that too.