"The Power of Habit" is a book by Charles Duhigg that explores the science behind why habits exist and how they can be changed. Duhigg explains that habits are formed through a loop consisting of a cue, routine, and reward. Understanding this loop can help individuals identify and modify their habits, leading to personal and professional growth. The book also delves into the impact of habits on organizations and societies. Duhigg illustrates how companies like Starbucks and Target leverage habits to influence consumer behavior. By recognizing the power of habits, readers can harness them to create positive changes in their lives and communities.