If you know something valuable never give it for FREE.
Its human psychology, if you invest on something, you try to work hard to achieve your goals, you try to recover your investment by achieving your aim.
If you get anything for FREE, it can easily become invaluable for you, and you take it for granted.
Yes by using this book, you can Lose your weight by not leaving your favorite food immediately. You can achieve fit, good looking and healthy body in as fastest way as possible, again still you can keep on eating your favorite food. Try it yourself and see the results.