The origin of the word insomnia lies in Latin wherein "in" means no and "somnus" means sleep. This disorder is described as an inability to sleep or an absolute lack of sleep and several distinct analyses have shown that insomnia is quite a general condition, with symptoms present in almost 33-50% of the adult population. This book presents an elaborative and most advanced overview on the management and diagnosis of the recent knowledge of this disorder, describing distinct matters associated with this problem, including diagnosis, quality of life, epidemiology, psychopharmacology and management. For the presentation of a balanced medical outlook, this book is accumulated with contributions made by renowned researchers and scientists from across the globe.