«Astonishing . . . an amazing book . . . absolutely chocker full of things that we need to know»

Chris Evans

«Amazing . . . I'm obsessed with this book»

Thom Yorke

«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

«Passionate, urgent . . . it had a powerful effect on me»

Rachel Cooke, Observer

«An important and fascinating book»

Bill Gates

«Compelling and utterly convincing . . . you'll never think of your bedtime in the same way again»

James McConnachie, Sunday Times

«A stimulating and important book . . . richly packed with science»

Clive Cookson, Financial Times

«Uplifting . . . Walker is in love with sleep and wants us to fall in love with sleep, too»

David Kamp, New York Times

«Matthew Walker is probably one of the most influential people on the planet»

Katie Law, Evening Standard