I read the book a couple of years after diagnosis and tried the diet. It did not work for me, but there are some specific foods included that really give me trouble, so I was not too surprised. However, I have heard here and elsewhere that it works for many people. What worked better for me was simply trial and error, eliminating those foods that give me problems and being sensible about portion sizes and meal choices. As a caveat, I will add that my disease is considered to be mild, and although I've had my share of flare-ups, they've been minor compared to what many patients with more severe disease experience. To me, diet is as individual an aspect of disease management as any other aspect of it, and you have to work to find what will be best for you.
Dx Crohn's Disease 1996
Have taken Prednisone, Pentasa, Rowasa, and Asacol
Currently on Asacol 2400 mg daily to manage remission