Coming Soon

Murdle Jr.: Codes, Cover-Ups, and Cookies

By G.T. Karber

By Wendy Mass

On Sale: May 5, 2026
Page Count: 224 pages
Publisher: Little, Brown Books for Young Readers
ISBN-13: 9780316602792

$8.99

$11.99 CAD

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Inspired by the internationally bestselling Murdle phenomenon, comes the second novel in the thrilling mystery series for fans of The Candymakers and The Swifts.

Olivia is literally the world’s smartest detective. She can hack into any computer, get past any firewall, download anything she wants, and that’s why she is so incredibly excited to spend the summer doing an independent work-study program at her father’s company.

Olivia’s father is the owner of the largest and most powerful company in the world, TekCo Futures. And he’s about to debut an Artificial Intelligence supercomputer that will change the world forever. But when Olivia’s father collapses on the night before the big release, it’s up to Olivia—and her arch nemesis—to solve the mystery and unmask the criminal behind it all!

Trouble comes to Tekco, and mysteries haunt its Metaverse. Can Olivia crack the case?

SOLVE THE PUZZLES:
Curious Crimes for Curious Minds
Ready, Set, Solve!
Wild Goose Case

ENJOY THE MINI’S:
Summer Fun

READ THE MYSTERIES:
Sleuths on the Loose
Codes, Cover-Ups, and Cookies

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Murdle Jr. Mysteries

Wendy Mass is the New York Times bestselling author of The Candymakers series, 11 Birthdays, and many other novels for young readers, including the Schneider Family Book Award winner A Mango-Shaped Space. She lives in New Jersey with her family and their very cute dog.

G. T. Karber grew up in a small town in Arkansas, the son of a judge and a civil rights attorney. As a lifelong mystery fan, he has organized more than forty immersive mysteries in Los Angeles.

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G.T. Karber

About the Author

G. T. Karber grew up in a small town in Arkansas, the son of a judge and a civil rights attorney. As a lifelong mystery fan, he has organized more than forty immersive mysteries in Los Angeles.

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Wendy Mass

About the Author

Wendy Mass is the New York Times bestselling author of The Candymakers series, 11 Birthdays, and many other novels for young readers, including the Schneider Family Book Award-winner A Mango-Shaped Space. She lives in New Jersey with her family and very cute (but not robotic) dog.
Nora Raleigh Baskin is the award winning author of 15 novels for middle grade and YA readers. She has won the ALA Schneider Family Book award for Anything But Typical and the ILA Notable Book For a Global Society for Ruby On The Outside. Nine, Ten: A September 11 Story received star reviews from both Kirkus and Publishers Weekly.

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G.T. Karber

About the Author

Wendy Mass

About the Author

Murdle Jr. Mysteries