Mystery Books for 3rd Graders

Our mission is making literacy accessible to all children, because reading opens doors to endless possibilities. Find the best mystery books for 3rd graders featuring young detectives and exciting clues. These children’s books for ages 7-8 combine suspenseful plots with grade-appropriate reading levels perfect for elementary students.
Mystery Decodable Reader with gh Words | Forbidden Book Club 9

Forbidden Book Club Issue Nine: The Belly of the Beast

4.2 Books are rated by kids in the Bookbot app
When four friends discover a notice board filled with missing person reports, they notice something strange - every disappearance is connected to water. Following the river to investigate, disaster strikes when a giant crocodile swallows Skink whole! But instead of danger, she finds something incredible inside - a hidden world with over a hundred people and amazing animals. What is this mysterious creature really doing, and can Skink help her friends understand the truth?
Mystery Adventure Animals <gh>
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Fantasy Decodable Reader with 'augh' Words | Toadpocalypse

Forbidden Book Club Issue Eight: Toadpocalypse

4.1 Books are rated by kids in the Bookbot app
Darren, Ada, Lachlan, and Skink enter a mysterious story world that looks like a devastated future city. As they explore the dark, polluted streets filled with strange remains, they discover something shocking: giant toads have taken over! What happened to this world, and can the friends survive this dangerous story?
Fantasy Adventure Mystery <augh>
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Mystery Decodable Reader with ei Words | Forbidden Book Club Issue One

Forbidden Book Club Issue One: The Machine

4.1 Books are rated by kids in the Bookbot app
When Ada and her friends destroy Mrs. Quigley’s prize roses, they expect a terrible punishment. Instead, the strange old lady offers them tea and rock cakes—and reveals a shocking secret. She owns forbidden books! In a world where exciting stories were destroyed long ago, Mrs. Quigley wants the children to read these mysterious tales to her. But why were these books banned in the first place, and what secrets do they hold?
Mystery Adventure <ei>
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Mystery Decodable Reader with si words | Forbidden Book Club Issue Three

Forbidden Book Club Issue Three: The Min Min Lights

4.1 Books are rated by kids in the Bookbot app
When Ada, Darren, Skink, and Lachlan enter a mysterious book, they find themselves in a rundown town where everyone hides inside after dark. Strange glowing lights called min min lights appear at night, and anyone who follows them into the bush never comes back. A man warns them about his missing daughter, but Ada wants to investigate anyway. As they follow the eerie lights deeper into the darkness, they begin to wonder—what really happens if they can’t solve the book’s mystery?
Mystery Adventure Fantasy <si>
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Funny Decodable Reader with Soft C Words | Jack Attack

Jack Attack

4.1 Books are rated by kids in the Bookbot app
Zom gets a big surprise when he finds cake all over his farm one morning! The next day, it’s coal everywhere. Then eggs! Someone is playing pranks, and Jack thinks it’s the funniest thing ever. Zom stays up all night watching Jack’s door, but the mysterious messes keep appearing. Skel decides to stand guard in the paddock to catch the prankster once and for all. What will he discover coming over the hill?
Humor Mystery Soft-c
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Free Mystery Decodable Reader with xi Words | Who Ate It?

Who Ate It?

4 Books are rated by kids in the Bookbot app
Kina and Kale discover a mysterious bite taken out of a guava on their favorite tree. They investigate suspects like caterpillars, grasshoppers, and chickens, but nothing fits. When the sun sets, Kina has a brilliant idea: what if the guava biter only comes out at night? Join the siblings on an exciting nighttime adventure as they set up camp and search for the mysterious creature. Who—or what—ate the guava?
Mystery Adventure Family <xi>
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Fantasy Decodable Reader with Silent 'wr' Words

Forbidden Book Club Issue Six: Lyre, Lyre, Pants on Fire!

3.7 Books are rated by kids in the Bookbot app
When four children enter a magical story world, they find themselves in a strict school where copying books is the only task. But when a classmate questions a fact in her book, something strange begins to happen. As mysterious phone alerts disrupt the classroom, Ada discovers there’s more to this story than meets the eye. Will she uncover the truth?
Fantasy Adventure Mystery <wr>
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Adventure Decodable Reader with Soft g | Forbidden Book Club Issue Twelve

Forbidden Book Club Issue Twelve: All Good Things

3.5 Books are rated by kids in the Bookbot app
Ada and her friends have been secretly reading forbidden fiction books with the help of mysterious Mrs. Quigley. Now Ada has discovered a hidden box of books in her attic, and the group has exciting plans to share even more stories together. But when they arrive at Mrs. Quigley’s house, they find an ambulance waiting outside. What was in the letter Mrs. Quigley left behind for them? Will the Forbidden Book Club continue their adventures?
Adventure Friendship Mystery Soft-g
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Free Decodable Reader with 'augh' Words | Banana Hunt

Banana Hunt

3 Books are rated by kids in the Bookbot app
Monkey’s breakfast bananas have vanished! His tummy is rumbling and he’s searching everywhere. He questions a busy bee and a sleepy snake, but neither one took his fruit. Following a mysterious yellow trail, Monkey discovers who the banana bandit really is—but will he get his breakfast back?
Animals Mystery Humor <augh>
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Mystery Books for Third Graders

Our mystery kids books for 3rd graders challenge young detectives ages 7-8 to solve exciting cases. These children's books feature clues, suspects, and plot twists that keep readers guessing. Each mystery story develops critical thinking and inference skills while entertaining third graders who love solving puzzles.

Mystery Picture Books Ages 7-8

Discover mystery picture books designed for ages 7-8. These online story books feature age-appropriate suspense that independent readers can handle. Our storybooks include visual clues that help readers solve cases alongside characters, developing logical thinking for third grade readers.

Best Mystery Stories for 3rd Grade

Our mystery stories engage 3rd graders with whodunits and detective adventures featuring kid investigators. These children's story books feature school and neighborhood mysteries that elementary students relate to. Each book builds comprehension through clue-gathering and deduction skills.

Mystery Children's Books Online

Access our mystery books for kids online anytime for your third grader. These PDF children's books deliver suspenseful adventures on any device. Our online childrens books feature grade-appropriate mysteries with satisfying solutions, ideal for independent readers who enjoy challenging their detective skills.

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