Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace.

Ali Cross is following in his father Alex Cross' footsteps as a detective. A crime at a concert near his school sparks his newest investigation, and it gets dangerous fast. When Ali sees a friend get hurt, he’s the best person to find out who did it. Even if he's only a kid. After all, he’s Alex Cross's son. Solving crimes runs in the family.

On her first day of fifth grade, Cam Jansen uses her photographic memory to help the police find a car thief. Includes a memory game.

When Fletcher Moon, the youngest detective in the world, is framed for a crime he did not commit, he must team up with the unlikeliest of allies, run from the authorities, and solve the case within twelve hours to clear his name.

An avid Sherlock Holmes fan, eighth grader Ingrid Levin-Hill is kidnapped while investigating mysterious happenings in her home town.

Dunc and Amos research the cannon that stands in the town square and find a note inside telling about a time portal.

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.

The solutions to ten mysteries solved by Leroy "Encyclopedia" Brown are given in a separate section challenging the reader to match wits with the ten-year-old mastermind of Idaville's war on crime.

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.

On a trip to New York City to visit Randi's aunt, the ninja detective trio explores Randi's old neighborhood in Brooklyn, where they uncover an art heist involving Fabergé eggs. Except no one will believe them. So they'll just have to catch the criminals in the act...