This best-selling resource presents a well-researched look at sleep – how and why humans and animals sleep and dream, how it affects the immune system and cognitive function, the impact of technology, drugs, and societal structures on sleep, and sleep disorders. Readers are encouraged to reflect on their lifestyle and conditions that might affect their sleep and will discover that sleep and dreaming can improve, repair, and promote a healthy body. Useful to extend lessons related to sleep behaviour in both humans and animals and for individual student research on these topics, as well as to provide examples of controlled studies and the scientific method. Suitable for grades 8-12. Log in to read the full review.