"The Willpower Instinct: How Self-Control Works, Why It Matters, and What You Can Do to Get More of It" by Kelly McGonigal is a book that explores the science of willpower and self-control. McGonigal, a health psychologist, draws on research from psychology, neuroscience, and economics to provide insights into how willpower works and how it can be strengthened. The book covers a range of topics, including the biological basis of willpower, the role of stress and emotions, and practical strategies for building self-control. McGonigal introduces concepts such as the "willpower muscle," which can be fatigued or strengthened, and the "pause-and-plan" response, which helps resist impulsive behaviors. She also discusses the importance of self-awareness, mindfulness, and setting realistic goals. "The Willpower Instinct" aims to help readers understand the science of willpower and develop the skills to achieve their goals and improve their well-being.