This book challenges common misconceptions about happiness by examining various life stages and events often believed to guarantee or prevent it. The author explores the myths surrounding marriage, career, wealth, aging, and health crises, revealing that our predictions about our emotional responses are frequently inaccurate. It emphasizes the role of hedonic adaptation, our tendency to return to a baseline of happiness, and how this impacts our experiences. The text offers evidence-based strategies for navigating life's challenges, such as managing expectations, cultivating gratitude, practicing mindfulness, and pursuing meaningful goals. Ultimately, it argues that happiness is not solely determined by external circumstances but can be actively influenced by our mindset and behaviors. The book encourages readers to reconsider their beliefs about what makes us happy and unhappy, empowering them to approach life's transitions with greater resilience and the potential for growth.