'Amazing . . . I'm obsessed with this book' Astonishing ... an amazing book ... absolutely chocker full of things that we need to know -- Chris Evans Matthew Walker is probably one of the most influential people on the planet -- Katie Law * Evening Standard * Uplifting . . . Walker is in love with sleep and wants us to fall in love with sleep, too -- David Kamp * The New York Times * A stimulating and important book . . . richly packed with science -- Clive Cookson * Financial Times * Compelling and utterly convincing . . . you'll never think of your bedtime in the same way again -- James McConnachie * The Sunday Times * Passionate, urgent . . . it had a powerful effect on me -- Rachel Cooke * Observer * A neuroscientist shows how a good night's shut-eye can make us cleverer, more attractive, slimmer, happier, healthier and ward off cancer . . . it's probably a little too soon to tell you that it saved my life, but it's been an eye-opener -- Mark O'Connell * Guardian *.