Although medical experts know people need sleep to remain healthy, many of the mechanics of sleep remain a mystery, which can make it difficult to diagnose and treat sleep disorders. Through informative main text, annotated quotes, detailed charts, and engaging sidebars, readers learn about these difficulties as well as the realities of living with sleep disorders such as insomnia and narcolepsy. A list of organizations to contact for further resources and support is also available for readers who want to go more in-depth into a particular disorder that they or a loved one may be suffering from.