An acclaimed author and a #1 New York Times bestselling illustrator team up to bring us a funny, warm, and utterly winning chapter book that follows, day by day, the first hundred days in one first grader's classroom. One of Slate ’s 25 Greatest Picture Books of the Past 25 Years In just one hundred 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 one hundred short chapters and accompanied by tons of energetic illustrations from 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 Praise for the Harry Versus the First 100 Days of School : "Funny, authentic, and insightful.” — The Horn Book , starred review "[A] realistic, comical, heartwarming journey." — Kirkus Reviews , starred review “Infused with the author’s characteristic, multileveled tongue-in-cheek humor and even some satiric tweaks.” — Booklist , starred review “Endearing from the get-go.” — Publishers Weekly , starred review “This appealing chapter book is a terrific addition to any 100-day narrative collection. It is perfectly tailored for a read-aloud and is bound to be a favorite .” — School Library Journal Praise for the Toys trilogy: "This charming book makes ideal bedtime reading." — The Wall Street Journal “ A sure hit for reading aloud and a classic in the making.” — The San Francisco Chronicle "Jenkins deftly penetrates the natural anxieties of childhood —the phobias, the insecurities, the self-doubts—without playing them down." — The New York Times Book Review EMILY JENKINS has written many acclaimed books for children, including three chapter books about the toys: Toys Go Out, Toy Dance Party, and Toys Come Home . Her picture books include the Sydney Taylor Award-winning All-of-a-Kind Family Hanukkah, which received four starred reviews; A Greyhound, a Groundhog, which received five starred reviews; Toys Meet Snow, recipient of four starred reviews; Water in the Park, a Booklist Editors' Choice and a Bulletin Blue Ribbon Book; and two Boston Globe-Horn Book Honor Books. Visit her at emilyjenkins.com or follow her on Twitter at @elockhart. PETE OSWALD is the #1 New York Times bestselling illustrator of The Good Egg, as well as The Bad Seed , which was an Amazon Best Children's Book of the Year and an indie favorite. He has worked as a character designer, a concept artist, and an art director on many popular films, including Madagascar 2, Cloudy with a Chance of Meatballs, and Angry Birds. This is his first chapter book. Chapter 1  Don’t Leave Me  DAY 1. Wednesday, September 5 Harry has been to day care before. He went to kindergarten, too, but that was in the trailers on the other side of the play yard. First-grade classrooms are in the big-kid school. The Graham School is four blocks from home. Harry walks with his sister, Charlotte. Mommy is a little ways behind. “If you need me,” says Charlotte, “I’ll be upstairs in fourth grade, room three-oh-three. Plus we have lunch and recess at the same time, so you’ll see me then. Got it?”  Harry nods. The weather still feels like summer. The trees on their street are bright green. Charlotte wears red shorts and a new T-shirt with sequins, plus her favorite running shoes. She has two braids in her hair. Harry is wearing his green sneakers, blue shorts, and his favorite shirt with four horses.  “Will there be guinea pigs at school?” he asks.  “Don’t worry about guinea pigs, H. Really.”  “What if kids are mean?”  “Some people are mean, yeah,” says Charlotte. “But boo on them. Just don’t hang out with them.”  Harry stops walking. “Will the teachers yell?”  “The music teacher yells. But I still like her. She plays the accordion.”  Yelling? No way. Harry turns and starts to run back home. He zooms past Mommy, down the block. He climbs the steps to his apartment building and plasters his body against the front door. “I’m not going to school!”  His mom follows. “H, what’s wrong?”  “There are mean kids and yelling teachers! Charlotte said so!”  “Did not,” says Charlotte, catching up. “I was just being realistic.”  “I’m not going!”  His mother pats his back. “H,” she says, bending over. “What are you scared of?”  Harry wants to say, “I might not make friends! What if someone picks on me? What if I get in trouble? What if I’m the only one who can’t read yet?” He wants to say all that, but it won’t come out. Instead, he says, “You can’t make me go!”  Mommy holds out her hand. “School is fun,” she