The first 100 days of school won't seem scary at all after you live them along with first-grader Harry in this chapter book from an acclaimed author and a #1 New York Times bestselling illustrator.

In just 100 days, Harry will learn how to overcome first-day jitters, what a "family circle" is, why guinea pigs aren't scary after all, what a silent "e" is about, how to count to 100 in tons of different ways, and much more. He'll make great friends, celebrate lots of holidays, and learn how to use his words. In other words, he will become an expert first grader.

Made up of 100 short chapters and accompanied by tons of energetic illustrations from the bestselling illustrator of The Good Egg and The Bad Seed, this is a chapter book all first graders will relate to--one that captures all the joys and sorrows of the first hundred days of school.

"Funny, original, and completely captivating." --R. J. Palacio, bestselling author of Wonder