The Underwearwolf

Illustrated by Charles Santoso

LIST PRICE $10.99

PRICE MAY VARY BY RETAILER

Digital products purchased on SimonandSchuster.com must be read on the Simon & Schuster Books app. Learn more.

Get 20% off with code JULY20 plus free shipping on orders of $40 or more. Discount on physical products only. Terms apply.

Buy from Other Retailers

About The Book

Perfect for fans of Creepy Pair of Underwear, this wolfish picture book romp follows a kid who finds himself in a hairy situation when he dons a pair of not-so-normal undies under the light of the full moon.

Do not, under any circumstances,
Or for any reason,
Wear this underwear under the full moon.


Do you understand?

Get ready to howl with laughter as one rule-breaking, underwear-loving kid transforms into a—gasp!—UNDERWEARWOLF! Now he’s on an unforgettable nighttime adventure that may or may not include furry paws, sharp claws, uncomfortable wedgies, and an honest-to-goodness wild wolfpack! No butts about it—this is one read-aloud that’ll blow your undies off!

Appearances

SEP 26
10:00AM
In Person

Learn More
Chappaqua Children's Book Festival
Chappaqua Metro North Station
Chappaqua, NY 10514

About The Author

Photograph by Sam Falconi

Gideon Sterer is the New York Times bestselling author of The Christmas OwlI Will Read to YouFrom Ed’s to Ned’sNot 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 and on X.

About The Illustrator

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 SnurtchI 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.

Product Details

  • Publisher: Simon & Schuster Books for Young Readers (May 12, 2026)
  • Length: 32 pages
  • ISBN13: 9781665955591
  • Grades: P - 3
  • Ages: 4 - 8

Browse Related Books

Raves and Reviews

A KIDS' INDIE NEXT LIST PICK

★ "Best read beneath a gibbous moon to truly make your intended audience howl…with laughter."

Kirkus, STARRED REVIEW

"Sterer and Santoso mash the monstrous and the truly mundane in this gleeful picture book outing."

Publishers Weekly

Resources and Downloads

High Resolution Images

More books from this illustrator: Charles Santoso

BACK TO TOP