I see that no one has responded to you yet, and I am not the best person to answer your question....however, I have read the first two of her books and found them to be very informative and worth purchasing. It's been a while since I read them, so I can't remember if one was better than the other....

I have not read her new one or the cookbook. I do like her plans, but I was looking for weight loss and I ate too much while on her plan and didn't lose anything, so I switched over to Atkins at the time. But I do think she has a good plan(s) and someday if I ever get to my goal weight, I plan to re-read her books.

Good luck!