Ray Meddis writes in a non-technical style and succeeds admirably in making the science of sleep and intensive research studies on sleep accessible and even exciting for the general reader as well as for the scientist. He shows that not everyone is bound by a felt need for sleep; in fact, some human beings discussed at length in the book thrive on less than two hours sleep a night without any ill effects. The implications of the research described are little short of sensational; in particular, Dr Meddis believes that it is well within the bounds of possibility that future research will show us how changes can be brought about in normal people to free them from the bondage of their sleep instincts. This new perspective also leads directly into a radical reappraisal of the nature of insomnia and new possibilities for treatment.