1. Calculation and the Chess Master 2. The Cow in the Classroom 3. A Passion for Pi 4. Computing in a Surreal Realm 5. Pythagoras Plays Ball 6. Recycling Topology 7. Soap Films and Grid Walks 8. Mating Games and Lizards 9. Random Bits 10. Spreading Rumors 11. Toward a Fairer Expansion Draft 12. Cracking the Ball-Control Myth 13. Math and a Music Education 14. Sprouts 15. Groups, Graphs, and Paul Erdős 16. DNA Adds Up 17. Computing with the EDSAC 18. Waring Experiments 19. Old and New Arithmetic 20. Matchsticks in the Summer 21. Tricky Crossings 22. Beyond the Ellipse 23. Trouble with Wild-Card Poker 24. Prime Theorems 25. Champion Numbers 26. A Perfect Collaboration 27. Fragments of the Past 28. More than Magic Squares 29. Rolling with Reuleaux 30. Next in Line 31. Pennies in a Tray 32. Fair Play and Dreidel 33. Euclid's Fourteenth Book