About the Author

Ian Stewart is Emeritus Professor of Mathematics at the University of Warwick, U.K., and a Fellow of the Royal Society. He is the author or coauthor of more than 100 books, including Does God Play Dice? and (with Terry Pratchett and Jack Cohen) The Science of Discworld series. His app Incredible Numbers won a Digital Book World Award, and he was cowinner of the 2015 Lewis Thomas Prize for Writing about Science.