📒 The broad range of evolving advances in neuroscience of sleep has turned this field to a vibrant area of research both in basic and clinical perspectives. For sleep specialists who yearn to know "more and more of less and less" and the generalists who are limited by knowing "less and less of more and more", the current concise book contains a bunch of instant notes aiming to serve some professional needs. Assembled in this book, is the collective expertise of the author and some major physician-scientists who have commented on the basic and clinical aspects of the most prevalent disorders of sleep.