I
bought the book. As far as the rules of the diet go, the only difference is an additional rule to avoid most fruits.
However, the book also contains a lot of tips and tricks for making the diet work, as well as a lot of chapters that are unrelated to the diet, but quite interesting. Some other pieces from the book I'm playing with:
Eating at least 30g of protein within 30 minutes of waking up. My chart so far provides correlations between not getting enough protein and not losing weight. 11/27, 12/3 and 12/5 are all days I had less than 30g of protein for breakfast, and I either maintained or gained weight on those days. Could just be coincidence, but are a number of testimonials from the book that illustrated similar results. I'm going to continue experimenting with it.
Brief muscle contractions before and 90 minutes after meals. The concept being to convince your muscles to take some of the glucose that would otherwise end up in fat cells, and is intended as a damage control on cheat days and for less than ideal meals during the week. I've been doing 90 seconds of wall presses and/or air squats in the bathroom before and after lunch. I've no proof that this is helping, but the wall presses leave my shoulders nice and warm and relaxed, and getting some motion in while sitting at a desk all day is probably a plus, so I'll keep it up regardless.
Cold exposure. The book discusses exposure to cold causing the body to burn more fat. The least ridiculous suggestion is to sit with an ice pack on your shoulders for ~30 minutes in the evening. Again, I don't know if it's helping, but it feels quite nice, so I'm going to keep using it while I play video games in the evening.
Another chapter of the book is about "reversing permanent injuries." I read it for the tips on mid- and upper-back pain. The exercises suggested do seem to be reducing the aches I have from sitting at a desk all day.