In this book, Professor Matthew Walker, a leading scientific expert in sleep, explores the transformative power of sleep and how it affects our lives. He sheds light on the importance of sleep and dreaming, and how it enriches our ability to learn, memorize, and make logical decisions. Walker also answers important questions about sleep, such as how caffeine and alcohol affect it, and how common sleep aids can do long-term damage. He explains how we can harness sleep to improve our health, prevent diseases, and enhance our lifespan and success.