Eating healthy and doing exercise is very important for losing weight. If you follow a right way, of course you can get what you want.
I think the secerts are in the book. My friend recommends the book -
The UltraSimple Diet: Kick-Start Your Metabolism and Safely Lose Up to 10 Pounds in 7 Days to me. I searched a lot and found it pretty good, precise instructions for what foods to eat, what foods to avoid, recipes, supplements, and stress reduction--exercise is optional. And I am ready to get one. Maybe you can try this one.