"The Power of Habit" by Charles Duhigg is a book that explores the science of habit formation and how it can be used to improve our lives. The book is organized around the idea that habits are formed through a loop of cue, routine, and reward, and that by understanding this loop, we can change our habits for the better.

1. "The Habit Loop": Duhigg introduces the concept of the habit loop, which is the cue, routine, and reward that make up the structure of a habit. He explains how habits are formed in the brain and how understanding the habit loop can help us change our habits for the better.

2. "Changing Habits": Duhigg explains how to change habits by identifying the cue, routine, and reward, and then experimenting with different ways to change the routine. He provides strategies for breaking old habits and forming new ones.

3. "Habits in the Real World": Duhigg explores how habits are used in the real world, including in companies and organizations, in communities and societies, and in our personal lives. He provides examples of how understanding habits has led to successful change in various fields.

4. "The Role of Willpower": Duhigg explains the role of willpower in habit change, and how it is a limited resource that can be strengthened through the use of other habits. He provides strategies for building willpower and using it in conjunction with habit change.

5. "Putting it into practice": Duhigg provides practical advice for putting the ideas from the book into practice. He covers how to identify and change habits in your own life, and how to use the habit loop to improve productivity, health, and happiness.

Overall, "The Power of Habit" provides a comprehensive understanding of the science of habit formation and how it can be used to improve our lives. Duhigg presents the material in an easy to understand manner and provides practical strategies for changing habits and improving our lives. He explains the habit loop, how habits are formed in the brain, how to change habits and how to use habit loop to improve productivity, health, and happiness.