This is The Secret for weight loss book by Wafa Nafis. It is published on 19th June 2019. This books especially for weight loss people. The Secret for Weight Loss on the basis of all diet. Numerous diets advertise having found the formula for losing weight and having uncovered the secret of success. However, even though some concepts are more promising and/healthier than others, weight loss works solely through a calorie deficit or negative energy balance, that is, when the supply of energy in the form of food is less than the energy needed for daily activities and processes is needed.