Leonard Mlodi­now’s pre­vi­ous books include the best sell­ers Sub­lim­i­nal (win­ner of the PEN/E. O. Wil­son Lit­er­ary Sci­ence writ­ing award), The Drunk­ard’s Walk (a New York Times Notable Book), War of the World­views (with Deep­ak Chopra), and The Grand Design (with Stephen Hawk­ing), as well as The Upright Thinkers, Feyn­man’s Rain­bow, and Euclid­’s Win­dow. He also wrote for the tele­vi­sion series Mac­Gyver and Star Trek: The Next Generation.