Just ge 17 day diet book and follow it. It is a good diet. And it works. You do not have to buy any food. you can make simple food for youur self.
Or else make simple changes in your diet. Like drink 10 glasses of water per day. Eat salad with balsamic vinegar and 1 tbs olive oil dressing. eat 3 times a day. do not skip break fast. eat 2 fruits a day. Avoid sugar, bread, cakes pestries, and fried stuff. Eat 2 tbs pine nuts 3 times a week.