Deep down, Zero knows he's a hero—but he just can't seem to fit in with the other numbers in town. After all, Zero's not a counting number like a 3 or a 5 or a 9. He's virtually invisible when it comes to addition and simply zilch when it's subtraction time. The other numbers flee when Zero discovers multiplication—he has the power to turn them into nothing at all! When it's time to play they all run away, leaving Zero feeling empty inside. But when the other numbers are suddenly surrounded by an invading army of Roman numerals, it looks like their days are numbered! There's only one hope: it's time for Zero to use the power of nothing to free his friends and save the day. This lively and humorous picture book slyly introduces some simple math concepts with a funny and exciting tale of courage and friendship.