Middle Grade Mysteries and Thrillers

This list includes titles from the Harrington Middle School 2026 suggested summer reading list, as well as recommendations from staff at the Mount Laurel Library. Remember, you do not need to choose a title from the list; you can fulfill your summer reading obligations by reading any middle grade book.

Updated May 11, 2026
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Mount Laurel Library
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The Misfits #1: A Royal Conundrum
Yee, Lisa
Paper Book
NEW YORK TIMES BESTSELLER . When a notorious thief is out for priceless treasure (gems! cats! general decorum!)-who're you gonna call? An elite team of crime-fighting underdogs, that's who! The Misfits are on the case in this hilarious series from Newbery Honoree Lisa Yee and Caldecott...
Naturals (Deluxe Limited Edition)
Barnes, Jennifer Lynn
Paper Book
#1 bestselling author Jennifer Lynn Barnes's fast-paced, full-throttle mystery with to-die-for romance is now available in a stunning deluxe hardcover edition! Featuring: An updated, shining foiled cover Stenciled sprayed edge design Lush endpapers<...
After Life
Forman, Gayle
Paper Book
A Good Morning America Book Club YA Pick "Gayle Forman has an uncanny ability to create characters in which we see ourselves, and her latest--which looks at where love goes, after a loss--is an honest, heartbreaking elegy to how memory makes relationships...
The mysterious Benedict Society
Stewart, Trenton Lee.
Paper Book
For fans of Lemony Snicket and Escape from Mr. Lemoncello's Library, this first book in the bestselling, award-winning Mysterious Benedict Society series is not to be missed! "Are you a gifted child looking for special opportunities?" Dozens of...
From the mixed-up files of Mrs. Basil E. Frankweiler
Konigsburg, E. L.
Paper Book
When Claudia decided to run away, she planned very carefully She would be gone just long enough to teach her parents a lesson in Claudia appreciation.  And she would live in comfort-at the Metropolitan Museum of Art.  She invited her brother Jamie to go, too, mostly because he was a miser and would...

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