This document is an introduction to a book that aims to help readers transform their bodies in 28 days through diet and lifestyle changes. It discusses how weight loss is difficult but possible, and losing weight gradually over time through calorie deficit and exercise. It emphasizes developing a positive mindset and not giving up even if progress is slow, as changes are happening on the inside. The book will provide a full program to help readers lose weight and see results within 28 days to stay motivated on their journey.