Book excerpt: The Oxford Handbook of Sleep Medicine provides a comprehensive, practical guide to clinicians of all backgrounds for the diagnosis and treatment of sleep disorders across clinical specialties. Sleep medicine is encountered in almost every field of medicine yet clinical training and practical guidance is often difficult to find. This handbook is essential for all clinicians seeking a clear and concise quick-reference guide to sleep disorders in their day-to-day practice, from the GP to specialists in respiratory medicine, psychiatry, neurology and surgery. It will also provide an excellent resource for those pursuing specialist training in clinical sleep medicine. This handbook is written from a practical perspective, to guide clinical practice, rather than providing simply theoretical knowledge. It provides guidance from experienced clinicians across a range of specialties to provide a truly comprehensive multidisciplinary approach to sleep medicine. This handbook covers the full range of sleep disorders, from insomnia to very rare movement disorders, to ensure the reader has quick access to the right information whenever they need it.