When a thief breaks into the P.E. lockers, leaving behind cryptic ransom notes, Drew Leclair, who is determined to stay out of trouble, investigates while dealing with her friends' obsession with the upcoming Wonderland dance.

"Harriet Wermer investigates more mysteries during her stay on Marble Island"--

While investigating a series of old, spooky photos of a seemingly transparent boy for their friend Ree, who lives above a funeral home, best friends Colin and Neveah follow the clues to solve this mystery from the Great Depression.

Pets. Mina doesn't have any. This is super inconvenient when it's Showcase Your Pets week at school. Unfortunately, Mina's best friend Holly doesn't have any pets either now that her hamster's gone missing. And has anyone seen Danny's pet toad? An explosion at the local pet shop shows Mina that this pet palaver can't be a coincidence. But why is someone stealing all the animals? What do they want them for?

Third-grade detective Myron is called to the case when Jordan's robot is stolen, right before the school Maker Faire Robot Maze Challenge! With his unique perspective from the autism spectrum and help from his energetic detective partner, Hajrah, Myron just might be able to solve the second West Meadows mystery in time.

Randi Rhodes and her friends are heading back to Brooklyn to solve another mystery.

When their school bus veers off course while taking the kids from Gravelmuck Elementary on a field trip, monster detectives Tank and Fizz witness a crime that brings them snout to snout with Rockfall Mountain's oldest monster, the ancient dragon Firebane Drakeclaw.

Toby enters a contest that will determine the world's greatest detective and teams up with amateur sleuth Ivy to solve the mystery, but the pretend murder turns into a real one, and all of the participants become suspects.

"The Lilac. The bard songs say that she's the world's most fearsome bounty hunter. That there's no criminal she can't catch, no mystery she can't solve. None of that is true. Yet. In reality, the Lilac is just a kid, and the bard who wrote all that is her best friend, Dulcinetta. But the Lilac has set her goals on becoming the best bounty hunter in the Thirteen Kingdoms -- and when a priceless artifact goes missing from the home of famed monster hunter...

Wizard and his friends are clueless when they are sent on the trail of a blueberry pie thief--until he hits on a plan that is sure to nab the sweet-toothed pilferer.