Zero is a big round number. When she looks at herself, she just sees a hole right in her center. Every day she watches the other numbers line up to count: "1, 2, 3, 4, 5, 6, 7 . . . " "Those numbers have value. That's why they count," she thinks. But how could a number worth nothing become something? Zero feels empty inside. She watches One having fun with the other numbers. One has bold strokes and squared corners. Zero is big and round with no...