We can never run out of numbers--they just keep going and going and going! In this volume, readers learn about the different kinds of numbers, from natural numbers to negative numbers, as well as the different rules that exist when dealing with each type. From breaking down even and odd numbers to square numbers, this volume provides a guiding tool for readers to reference that builds on their classroom curricula. A quiz and answer key await readers at the end so they can put their bounty of learned knowledge to the test!.