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 approachable page...

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
Paper Book
The Dark Knight teams up with Scooby-Doo and the sleuths of Mystery Inc. in a series of adventures and mysteries! It all starts when Batman discovers his original purple gloves are missing-Velma, Shaggy, and Scooby-Doo will have to go back in time to solve the case! ...

AR: N/A

Lexile: 650

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, full-color...

AR: 3.9

Lexile: 680

Cosplay crime
Chan, Marty
Paper Book
Shy thirteen-year-old Bree must channel her inner anime heroine to solve a crime at the Anime Expo. Bree Wong and her best friend, Alix, are so excited to be at the anime fan convention. They're dressed as the lead characters from their favorite anime series. Bree cosplays as Red Squirrel,...

AR: 4.2

Lexile: 610

Denis ever after
Abbott, Tony
Paper Book
Written by award-winning author Tony Abbott and perfect for fans of The Ethan I Was Before and The Thing About Jellyfish, this bittersweet middle grade novel follows the ghost of Denis Egan as he teams up with his living twin brother to solve the mystery of his death. Denis Egan is dead....

AR: 4.1

Lexile: 620

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

King & Kayla and the case of the missing dog treats
Butler, Dori Hillestad
Paper Book
King & Kayla are back on the case in this laugh-out-loud mystery from the Theodor Seuss Geisel Honor Award-winning series. Kayla made peanut butter treats for Thor, Jillian's new puppy. But now the treats are missing, and King is under suspicion. Analytical Kayla...

AR: 2.2

Lexile: 440

Little Penguin and the mysterious object
Driscoll, 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. ...

AR: N/A

Lexile: N/A

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 novel about three friends who team up to find a hidden treasure in an...

AR: 4.4

Lexile: 620

The rez detectives
Judd, Steven Paul
Paper Book
This summer, Tasembo just wants to chill. But that's not an option when it's a scorching day on the Reservation and the Ice Cream Man is a no-show. In an attempt to impress his crush by solving the mystery, Tasembo joins forces with his neighbor, Nuseka, and his dog, Billy Jack, to take on their...

AR: N/A

Lexile: N/A

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

Sisterhood of sleuths
Bertman, Jennifer Chambliss
Paper Book
A clever and thought-provoking mystery that pays homage to classic Nancy Drew stories, perfect for fans of Wendy Mass and Trenton Lee Stewart. Maizy always assumed she knew everything about her grandmother, Jacuzzi.?So?when a box full of vintage Nancy Drew books gets left at...

AR: 5.1

Lexile: N/A

Under locker and key
Hymas, Allison K.
Paper Book
Eleven-year-old Jeremy Wilderson teams up with his rival crime fighter to stop the stealing spree that's wreaking havoc on Scottsville Middle School in this action-packed MAX novel. Jeremy Wilderson is not a thief. In fact, he is his middle school's one and only retrieval...

AR: 4.6

Lexile: 630


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