Mysteries for Tweens

Whether you prefer your mysteries cozy or creepy, puzzling or paranormal, the library has them all. This list features a wide array of middle grade mysteries.

Updated July 23, 2024
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Spy ring
Durst, Sarah Beth
Paper Book
Two modern-day kids discover the truth about an American Revolutionary War-era female spy through a treasure-hunt adventure in their hometown of Setauket, New York. With codewords and secret signals perfected, best friends Rachel and Joon are ready to spend their summer...
Omega Morales and the legend of La Lechuza
Kemp, Laekan Zea
Paper Book
Fans of The Girl Who Drank the Moon, Paola Santiago and the River of Tears, and Disney's Encanto will be captivated by this fantastical novel about a girl who must learn to trust her ancestral powers when she comes face-to-face with the Mexican legend La...
Puzzleheart
Reese, Jenn
Paper Book
Get ready to solve the mystery at the heart of this captivating new middle grade adventure about family--and a house with a mind of its own--from the award-winning author of Game of Fox & Squirrels and Every Bird a Prince, Jenn Reese. Twelve-year...
The Fairfleet affair
Saxton, K. H.
Paper Book
 Follow clues, solve puzzles, crack the code... find the missing millionaire.   The celebrated museums of the Fairfleet Institute are known for curating the mysteries of humanity. But they don't solve mysteries. Luckily, twelve-year-old friends Alex...
Murder most unladylike
Stevens, Robin
Paper Book
A super-special 10th anniversary edition of the first gripping, award-winning mystery starring schoolgirl detectives, Daisy Wells and Hazel Wong. With a new introduction from the author and new bonus content! When Daisy Wells and Hazel Wong set up their very own secret detective...
Malamander
Taylor, Thomas
Paper Book
Nobody visits Eerie-on-Sea in the winter. Especially not when darkness falls and the wind howls around Maw Rocks and the wreck of the battleship Leviathan, where even now some swear they have seen the unctuous Malamander creep... Herbert Lemon, Lost-and-Founder at the Grand Nautilus Hotel, knows...
Wretched waterpark
White, Kiersten
Paper Book
A middle-grade mystery series that's spooky, creepy, and filled with gothic twists!Meet the Sinister-Winterbottom twins, who solve mysteries at increasingly bizarre summer vacation destinations in the hopes of being reunited with their parents-or at the very least finally finding a good churro....
Tangled up in luck
Wyatt, Merrill
Paper Book
"A sweet, heart-squeezing story!" -- Jaleigh Johnson, New York Times bestselling author of The Mark of the Dragonfly When seventh grade enemies research a missing set of jewels for a class project, they realize that the answers to the unsolved case might be much...

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