I guess I am about to be the odd-one-out here. I read the book a few months ago and it was interesting but I would hesitant to rate it higher. It is a worthy read and I have totally blackened the bedroom as the result but I have suspicion on what is said on the length of sleep. Around 7 hours is my maximum. If I go beyond that point I seem to fall into a second sleep and for the remainder of the day feel very tired indeed. If I arise between the 6th and 7th hour then I awaken refreshed and can continue throughout the day without napping. Darkening the bedroom entirely does appear to provide a more fulfilling sleep but to write a book to prove this point? It's a long story indeed!

Managed to resell it through Amazon.