Mo Willems, creator of the revolutionary, award-winning, best-selling Elephant & Piggie series, is back with another breakout beginning-reader series. This time, an ensemble cast of Squirrels, acorns, and pop-in guests host a page-turning extravaganza! Each book features a funny, furry adventure AND bonus jokes, quirky quizzes, nutty fact formats, and so, so many squirrels!

In I Lost My Tooth!, Zoom Squirrel has lost a front tooth! The Squirrels leap into action when they discover the missing tooth is a baby tooth! Do you know more about teeth than the Squirrels do? You will by the end of this book!