Children's Mystery Books

Mystery Books for Grades 1 - 6

Updated June 18, 2026
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City of Mission Viejo Library City of Mission Viejo Library
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Children's Mystery Books

Mystery Books for Grades 1 - 6

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Ada Lace, on the case
Calandrelli, Emily
Paper Book
From Emily Calandrelli--host of Xploration Outer Space, correspondent on Bill Nye Saves the World, and graduate of MIT--comes the first novel in a brand-new chapter book series about an eight-year-old girl with a knack for science, math, and solving mysteries with technology.

AR: 4.0

Lexile: 590

The Batman & Scooby-Doo Mysteries. Volume 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 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

Cosmos Camp
Giles, Lamar
Paper Book
An Edgar Allan Poe Award Nominee! From Edgar Award nominee and WNDB cofounder Lamar Giles, this middle grade adventure stars the Epic Ellison twins as they race to solve the mystery of Cosmos Camp for young geniuses in a stand-alone companion to the Legendary Alston Boys series. ...

AR: N/A

Lexile: 830

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 and 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. Little Penguin has...

AR: N/A

Lexile: N/A

Montgomery and the Case of the Golden Key
Crowder, Tracy Occomy
Digital file
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 : A Mystery Adventure in the National Parks. / National Park Mystery
Johnson, Aaron
Ebook

AR: 4.8

Lexile: N/A

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

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

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https://librarian.syndetics.com/syndeticsunbound/lp/2069.2567/list/7195

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