ALSO BY STEPHEN HAWKING

A Brief History of Time
A Briefer History of Time
Black Holes and Baby Universes and Other Essays
The Illustrated A Brief History of Time
The Universe in a Nutshell

FOR CHILDREN

George’s Secret Key to the Universe (with Lucy Hawking)
George’s Cosmic Treasure Hunt (with Lucy Hawking)

ALSO BY LEONARD MLODINOW

A Briefer History of Time
The Drunkard’s Walk: How Randomness Rules Our Lives
Euclid’s Window: The Story of Geometry from Parallel Lines to Hyperspace
Feynman’s Rainbow: A Search for Beauty in Physics and in Life

FOR CHILDREN

The Last Dinosaur (with Matt Costello)
Titanic Cat (with Matt Costello)