Although the book makes a lot of the science, it is useful advice. In some ways you can cut to the chase quickly as the diet is really simple. It is not widely known as, except for selling the book, there is no money to be made commercially. I have been on it for about 7 weeks and have lost about 20lbs. It has been easy too. You do not need to calorie count as such and can eat what you want, as normal, every other day. I ignored the advice to take to slimfast type shakes on the "down" days as the boredom, for me, would set in fast. I have a piece of fruit, a no fat 70 calorie yoghurt for breakfast, a piece of fruit for lunch and a small salad for dinner (lettuce, tomato, oily fish). Is it boring? Yes, it would be like all diets except that you are sustained by tomorrow it is back to normal eating. To suit what I was doing one week, I tried a "down day" two days running. it was fine, no great hunger panes. It is a diet you can switch on and off with ease without feeling you need to abandon it or losing the willpower. The book makes a lot of the science of switching on the starvation gene but while I cannot counter this, at its simplest it is about eating less and if you stick to it, 2 or 3 low calorie days in a week over the week say 25-35% calories overall less for the week. Its joy is it is doable for the long term. You look forward to tomorrow (the normal eating day) and the food then tastes great. It can be a little hard getting through the day, especially if other family members are eating tempting things, but you console yourself with "it is only for today" .On the normal day I do not have the urge to overeat but if I fancy a bowl of ice cream I have it (but not for the sake of it).
I recommend the book which gives you the belief in the science, even though it is so easy to grasp, but do recommend trying the diet