Children's Mystery Books

Mystery Books for Grades 1 - 6

Updated June 18, 2026
C
City of Mission Viejo Library
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Agent Moose
O'Hara, Mo
Paper Book
Agent Moose, the best (worst) secret agent in the Big Forest, and his slightly-more-intelligent sidekick Owlfred are on the case in this new full color graphic novel chapter book series from Mo O'Hara, author of My Big Fat Zombie Goldfish, illustrated by Jess Bradley!...

AR: 3.0

Lexile: 400

Banana Fox and the Secret Sour Society
Kochalka, James
Paper Book
Eisner Award-winning cartoonist James Kochalka makes his Graphix Chapters debut with this laugh-out-loud mystery series! Get drawn into reading with Graphix Chapters! Graphix Chapters are ideal books for beginning and newly independent readers aged 6-8. With...

AR: 2.5

Lexile: 520

Bat and Sloth solve a mystery
Kimmelman, Leslie
Paper Book
Bath and Sloth are trying to sleep when they hear a noise. A LOUD noise. Can Bat and Sloth figure out where it's coming from and how to make it stop?

AR: N/A

Lexile: 510

The Batman & Scooby-Doo mysteries. Vol. 1
Cohen, Ivan
Ebook

AR: N/A

Lexile: 650

Bog gone!
Jones, P. Knuckle
Paper Book
Meet detective-in-training Finder and her friends as they try to figure out why everyone in Belly Acre Bog has disappeared in this hilarious graphic novel mystery! Perfect for fans of The InvestiGators! Finder the tree frog absolutely loves solving mysteries. So when all...

AR: N/A

Lexile: 550

The case of the poached painting
Curran-Bauer, Christee
Paper Book
The Museum of Food Art is in a state of panic! A priceless painting was pilfered in the middle of the night. Fortunately, the Pigeon Private Detectives--PPD for short--are on the scene. These three detectives crave cracking a good case almost as much as they like snacks. But can they...

AR: 3.9

Lexile: 540

The case of the strange splash
Winkler, Henry
Paper Book
From New York Times bestselling creators--Emmy Award-winning actor Henry Winkler, children's book author Lin Oliver, and Caldecott Medal-winning author-illustrator Dan Santat--comes Detective Duck: The Case of the Strange Splash, a hilarious,...

AR: 3.9

Lexile: 680

Escape from Mr. Lemoncello's library
Grabenstein, Chris.
Paper Book
THE START OF THE NEW YORK TIMES BESTSELLING SERIES WITH MORE THAN TWO MILLION COPIES SOLD! Can you escape from what James Patterson calls "the coolest library in the world"? Follow along and solve the clues in this interactive adventure! From the co-author of Murdle...

AR: 4.5

Lexile: 720

The ghost tree
Deen, Natasha
Paper Book
Is it science...or strange and ghostly? Asim's new town is freaking him out! There are weird noises at night, eerie lights, and now an evil tree that is growing way faster than it should. he's sure there's something supernatural going on. His friend Rokshar...

AR: N/A

Lexile: 440

Little Penguin and the Mysterious Object
Driscolll, Laura
Paper Book
Little Penguin solves his first mystery in this hilarious new I Can Read! adventure by Little Penguin Gets the Hiccups author Tadgh Bentley. For new readers who are fans of Mo Willems's Elephant and Piggie series and Adam Rubin's Dragons Love Tacos. Little Penguin has...

AR: N/A

Lexile: N/A

Montgomery and the case of the golden key
Crowder, Tracy Occomy
Audiobook
In 2008 Chicago, in the Southside community of Washington Park, Montgomery "Monty" Carver had hopes for the best summer ever! Unfortunately, things aren't going as planned. Monty is struggling to prove to his parents that he's old enough to be without adult supervision--especially after a very...

AR: 4.6

Lexile: 660

Murder is bad manners
Stevens, Robin
Paper Book
Two friends form a detective agency--and must solve their first murder case--in this "sharp-witted debut" (Publishers Weekly, starred review) that is the first adventure in a brand-new middle grade mystery series set at a 1930s boarding school. Daisy Wells and Hazel Wong...

AR: 5.9

Lexile: 910

Mystery in Rocky Mountain National Park
Johnson, Aaron
Paper Book
Before Jake's grandfather died, he was on the trail of a centuries-old mystery. And he has entrusted that mystery to Jake, leaving behind a set of hidden codes, riddles, maps, and other clues that lead Jake and his friends on a scavenger hunt into the heart of Colorado's wild and rugged Rocky...

AR: 4.8

Lexile: N/A

Mystery James digs her own grave
Russell, Ally
Paper Book
Abandoned in a cemetery and raised in a funeral home, a girl who can see and smell the supernatural must solve the mystery of a priceless heirloom stolen from her family's business. Perfect for fans of Netflix's Wednesday and Beetlejuice! "A new middle grade heroine you...

AR: N/A

Lexile: 860

The mystery of locked rooms
Currie, Lindsay
Paper Book
*Instant New York Times and USA Today bestseller!* Crack the codes. Find the treasure. Escape the house. From the acclaimed author of Scritch Scratch and What Lives in the Woods comes a action-packed adventure...

AR: 4.4

Lexile: 620

The mystery of the stinky, spooky night
Manushkin, Fran
Paper Book
When Pedro and his dad walk Katie home on a foggy night, something smelly fills the air! With their noses working extra hard, the two friends have a mystery to solve: What is that making that stink, and why is it following them?

AR: 2.0

Lexile: 440

The Sherlock society
Ponti, James
Paper Book
A New York Times bestseller! In the tradition of Nancy Drew, four kids and one grandfather in Miami tackle a decades-old mystery in this first book full of "atmosphere, history, and lively humor" (Publishers Weekly, starred review) in the Sherlock Society middle...

AR: 4.9

Lexile: 770

Shirley & Jamila save their summer
Goerz, Gillian
Paper Book
This middle-grade graphic novel for fans of Roller Girl and Smile introduces Jamila and Shirley, two unlikely friends who save each other's summers while solving their neighborhood's biggest mysteries. Jamila Waheed is staring down a lonely summer in a new...

AR: 2.8

Lexile: 490

Stella and the mystery of the missing tooth
Ewing, Clothilde
Paper Book
In this effervescent companion to the picture book Stella Keeps the Sun Up, Stella goes on the hunt to figure out who's behind her friend's missing tooth. Stella, her bestie Roger, and her second-best friend Owen are excited to go see Sue the T-rex at the museum, but when...

AR: N/A

Lexile: 510

Wallace and Grace take the case
Alexander, Heather
Paper Book
The Read & Bloom line offers high interest, character driven stories for newly independent readers that feature full-color illustrations throughout and will transition kids from leveled readers to a lifetime of reading. In this charming series, perfect for newly independent readers, kids will be...

AR: 2.7

Lexile: 490


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