The Underwearwolf

The Underwearwolf

by Gideon Sterer and Charles Santoso
Publication Date: 12/05/2026

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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!

ISBN:
9781665955591
9781665955591
Category:
Humorous stories (Children's / Teenage)
Publication Date:
12-05-2026
Language:
English
Publisher:
Simon & Schuster Books for Young Readers
Gideon Sterer

Gideon Sterer is an American author whose books include Skyfishing, illustrated by Poly Bernatene, Not Your Nest, illustrated by Andrea Tsurumi, From Ed's to Ned's, illustrated by Ruth Cummins, and The Night Knights, illustrated by Cory Godbey, which has been optioned by Sony Pictures. Gideon grew up in the woods of upstate New York, where his parents owned a little zoo where he would run around after-hours and let the animals out.

Charles Santoso

Charles Santoso has illustrated many books, including Dandy by Ame Dyckman, I Don't Like Koala! by Sean Ferrell, the New York Times bestseller Wishtree by Katherine Applegate, and Ida, Always by Caron Levis. He moves between different countries to live and work but calls Sydney, Australia home.

Available for download after 12/05/2026

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