About the Holiday

Reading is great all the time, but this month we celebrate actually being seen with a book in hand laughing at a funny line, shivering over a suspenseful scene or maybe even tearing up over an unexpected plot twist. Throughout the month, authors, illustrators, actors and actresses, athletes, business people, teachers, and students all upload pictures of themselves reading to encourage others to discover the joys of this fun and important pastime. To learn more about the holiday and find resources to download or order, visit the Get Caught Reading website.

The Underwearwolf

Written by Gideon Sterer | Illustrated by Charles Santoso

What do you give a kid who collects underwear? Underwear, of course! But not just any pair of underwear, I mean, this boy’s already got skull underwear, stars underwear, shark underwear, and even train underwear. So, if you want your gift to stand out, this underwear has to be something special! And that’s just what Uncle Larry gave his nephew: one pair of “different,” “strange,” and made-of-some-unusual-material underwear. There was just one caveat: “Do not under any circumstances or for any reason wear these underwear during the full moon.”

So our young connoisseur took a look at the moon, deemed it not too full, and slipped on his new acquisition. Too late to go back now! Those underwear had taken control of his whole body. His “eyes turned yellow,” his “hands became claws, and he “was hairier than a hundred hamsters!” It was undeniable. He “had become the Underwearwolf.”

Lured by the moon, he escaped his room and rampaged through town. Along the way he had inklings about what he could do, but they all presented the same problem: he would have been left “BUTT NAKED” in the most compromising places. Soon he heard the pack calling him, and he ran until they all came together on the top of a mountain to howl, “AWOOOOOOO!” at the full moon. As dawn began to break, our hairy protagonist knew it was time to head home before he was missed. In the safety of his own room, he could finally remove those transformational undies that he determined to never wear again, until . . . .

Gideon Sterer’s madcap monster romp will have kids howling from the extraordinary gift’s unwrapping to the story’s butt-naked wrap up. In between, The Underwearwolf is loaded with fast-paced uproarious mischief that invites plenty of “Awoooooos” and makes this book a perfect choice for rollicking read-alouds as well as playful bedtime story times.

Charles Santoso translates Gideon Sterer’s hilarious flip on the “clothing as gifts gaffe” with gusto as he presents a boy bored with the usual favorite toys but over the moon with a gifted pair of underwear. In his exuberant illustrations, Santoso delivers a hairy, bug-eyed imp caught in uncontrollable goofiness that readers will envy while laughing themselves silly.

Ages 4 – 8

Simon & Schuster Books for Young Readers, 2026 | ISBN 978-1665955584

Gideon Sterer is the New York Times bestselling author of The Christmas Owl, I Will Read to You, From Ed’s to Ned’s, Not Your Nest!, The Night Knights, and The Midnight Fair, among others. Gideon grew up in upstate New York, where his parents owned a little zoo in which he would run around after hours and let the animals out. He now lives in the Hudson Valley and invites you to visit him online at GideonSterer.com.

Charles Santoso loves drawing little things in his little journal. He gathers inspiration from his childhood memories and curiosities he discovers in his everyday travels. He has illustrated several picture books, including The Snurtch, I Don’t Like Koala, Finding Muchness, and Ida, Always. Charles also works as a visual development artist, creating illustrations for feature film projects. He lives and works in Singapore. You can visit him at CharlesSantoso.com.

Get Caught Reading Month Activity

The Underwearwolf Activity Kit

Get howling with this wolfishly wonderful The Underwearwolf Activity Kit from Simon & Schuster that lets kids set their wild imaginations free! The kit includes a coloring page, a page to list the nighttime adventures of readers-turned-underwearwolf, and finger puppets to act out their hijinks.

You can purchase The Underwearwolf from these booksellers

Amazon | Barnes & Noble | Bookshop

Picture Book Review