The Three Week Diet is a great read for dieters wishing to lose up to 23 pounds in just 21 days. The book is sectioned into the three main components of the diet. Many will find the section on willpower, motivation, and mindset to be the most useful as that is where many dieters struggle the most. Dieters will especially like that this diet does not involve giving up certain food groups entirely. This diet is successful because it involves developing healthy habits that people can easily incorporate into their daily lives.