Why do we need sleep? What is sleep? What happens when we don't get
enough? This Very Short Introduction addresses the biological and
psychological aspects of sleep, providing a basic understanding of what
sleep is and how it is measured, a look at sleep through the human
lifespan, and the causes and consequences of major sleep disorders. The
book describes dramatic breakthroughs in our knowledge of how sleep
occurs, what it does, and what happens to our health if we do not have
enough. The authors consider the impact of modern society, examining the
relationship between sleep and our 24/7 culture.