The prize for the pet show is missing. Jigsaw enters his dog Rags in the contest and has an idea to solve the case.

Ahoy, mateys! It's the first day of first grade, and it's all hands on deck for a young pirate and his crew. How much trouble can they get into? What will they do at recess? and, most important, what treasure awaits them at school?

Jigsaw decides to catch a ghost that kids saw dancing in the classroom--even if he has to stay after school to do it.

Adrian Lazarus, who became a zombie just before starting middle school, and new friends Gia, Zander, and Talal, navigate a mystery involving global warming, disappearing bees, and billionaire developers.

Eddie brought his baseball cards to school and now they are missing. It's time for Jigsaw to step up to the plate.

Mary O'Malley's only brother, Jonny is losing his battle to drugs and addiction and her mother is absent and distracted. It seems the only person who might understand is Griffen Connolly, whose older sister runs with Jonny in the wrong crowd. Mary thought Griff was too cool, too popular for her. But now he wants to hang out with her, and listen. When two girls Mary thought were her friends decide to slam another girl online, Mary tries to look the...

None of the other animals can sleep because Elephant has the hiccups.

Meet Carter, Esme, and Arnold, three students accidentally locked together inside an almost deserted school. They are not friends. They scarcely know each other. But In the basement, a mysterious night janitor waits. And outside, moving in the mist, dark shapes shuffle closer.

Kid detectives Jigsaw and Mila have a busy weekend when they are hired to find the owner of a lost purse, and then must solve the mystery of a missing dinosaur at their friend Bigs's birthday party.

Ghosts start haunting Jigsaw's classmates, but there's a new ghostbuster in town stealing all of Jigsaw's clients.