"How did math work before zero was invented? (Hint: It was complicated.) Dive into a fascinating history of a number! Now we can't imagine a world without zero. But for early civilizations, it wasn't an obvious idea. Take a journey through time and around the world, and find out how zero became part of our lives. Meet the people and visit the places that factored in to one of the most important numbers we have today. Veteran nonfiction author Sarah Albee brings her signature style to this biography of a symbol. And zero itself lends a hand!" --