Discover Math Matters! With over 15 million books sold worldwide, this award-winning series of easy-to-read books will help young readers ages 5-8 approach math with enthusiasm. Great for fans of MathStart or Step into Reading Math. Nate and Mandy discover that their pet rabbit Harley is missing. Surely they'll find him--or will Harley stay one hop ahead of them? With engaging stories that connect math to kids' everyday lives,...