The Path to Sleep, Exercises for an Ancient Skill. Hypnotic Training in the Neurology, Psychology & Physiology of Sleep. As someone who has struggled with sleep for quite a while, this book is a breath of fresh air. The author’s passion for sleep is palpable from the pages alone. Where the magic truly happens is in the free hypnosis audio files provided in the book. If you or a loved one are interested in sleep or struggle with sleep, this is the book for you.