What is good and restful sleep? And do we already suffer from a sleep disorder if we occasionally wake up at night? How does good sleep differ among children, adolescents, adults, and the elderly? The authors, doctors, and sleep medicine experts compile all the essential information you need in their concise non-fiction book, whether to seek the right help or to regain good and restful sleep through simple measures on your own. This book provides insights into the various forms of sleep disorders and helps to find restful sleep again with the simplest means possible. In addition to guidelines for sleep hygiene, it offers an overview of specific therapeutic steps that should ideally be carried out with the support of a sleep medicine specialist or trained medical or psychological therapists.