Based on Dr Colin Espie's 45 years of clinical and research experience, this expert manual for clinicians and healthcare professionals shows how best to assess insomnia and deliver effective treatment in everyday practice using cognitive and behavioural therapeutics (CBTx). The book provides in-depth background on the importance of sleep, the interactions between sleep and health, what insomnia is, and insomnia's negative impact on patients. Using detailed examples, metaphors, and practical guidance, it provides clear instructions on the evaluation of sleep complaints and on the why and how of selecting and providing a specific CBTx to suit the presenting patient. Delving beyond treating patients at the individual level, the book also considers how to develop an effective and efficient insomnia service at population scale.