I used that book before. I lost about 80 lbs about 10 years ago and kept it off for about 2 years before it started creeping back up. I still had about 60 more pounds to lose, but lost momentum and I couldn't stay on it any more. And I can't ever lose on the same diet twice.
I am trying Atkins but with my diabetes/nypoglycemia/hypothyroid, all it is doing is making my problems worse, so am looking for another plan.
Congratulations on your success. That's fabulous.