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When a new shark species is discovered off the Carolina coast, Mimi and Papa take Avery and Evan to Palmetto Bluff to learn more about it.

Avery, Ella, and Evan investigate a mystery involving rattlesnakes.

"Justina 'Ju' Feliciano and her fellow seventh-grade sleuths are on the case! A sneaky vandal has damaged scenery from the middle school drama club production and the newbie detectives must catch the culprit before opening night.

High school senior and science whiz Nearly Boswell, called Leigh, is thrilled when she gets an internship in a forensic science lab, since it is a step toward college and a way out of the trailer park--but soon she finds herself the target of a serial killer, one who seems to know a lot about the residents of Sunny View Trailer Park as well as her absent father's secrets.

"When Evan's father dies, Evan finds a hand-bound yellow book on his desk--the book his father had been reading when he passed away.

Stuart Tennemeier and his friends of the EMU Club (Exploration-Mystery-Unbelievable Club) solve different mysteries around their neighborhood.

With help from their cousin Harry, eight-year-old twins Ella and Ethan discover who is illegally taking coral from the reefs near their aunt and uncle's beach house on the shore of Australia's Coral Sea.

Avery, Ella, and Evan make a pair of dolphin friends, Marco and Polo, in Cocoa Beach, Florida.

While Mimi is recovering from a broken leg, Avery and Evan visit the Savannah National Wildlife Refuge with Christina, but they become concerned when they overhear rumors of 'gator poaching,' and become determined to help find the culprits.

"Along the train lines north of New York City, twelve-year-old neighbors Myla and Peter search for the link between Myla's necklace and the disappearance of Peter's brother, Randall.

Siblings Amy and Dan Cahill continue their global search for the clues that will unlock the Cahill family's secret power while also working to evade Irina Spasky.

Henry, Jessie, Benny, and Violet Alden, spending the summer out west, decide to investigate when their friend Mike's house burns down and he is blamed for starting the fire.

Teenage detective Tandy Angel attempts to exonerate her famous brother of murder charges, track down a New York City killer, and figure out what happened to her lost love.

When high school sophomore Hannah discovers that her sister Alexis, a senior, is involved with someone she met online, Hannah tries to learn if it is a scam.

Second-grader Sam starts a detective club at school and, because there are no mysteries to solve, gets permission to seek the owners of three items from the lost and found closet.