Fifth-grader PJ "Clueless" McGee writes a series of letters to his father, a private investigator, telling of his attempt to learn who stole the science fair trophy, thus clearing his own name.
While on a school field trip to the county fair, nine-year-old Lee Price and his friends from St. Orlock's Elementary School for Vampires find and help capture some robbers.
Winston attends a weekend of puzzles at a famous musician's mansion, but when he and other young guests pursue a thief, they find themselves in big trouble. Puzzles for the reader to solve are included throughout the text.
Raised to be a thief, blind orphan Peter Nimble, age ten, steals from a mysterious stranger three pairs of magical eyes, that lead him to a hidden island where he must decide to become a hero or resume his life of crime.
When an anonymous note threatens someone they love, twins Sadie and Saskia Dopple are thrust into a series of crimes that look suspiciously like something from the pages of a mystery novel.
Trying to help Mr. Farmer with his finances, Minnie and Moo go to the bank to ask for money and are mistaken for the Bazooka sisters, dangerous outlaws.
Erik Morrissey Ganger and his friend, fourteen-year-old Sadie Dopple, meet a wealthy recluse while trying to escape tunnels under Isambard Dunstan's School for Wayward Children in order to pursue a former foe who has inadvertently kidnapped Sadie's twin sister, Saskia.
A gang that uses parties as a cover for robberies victimizes a masquerade party Nancy is attending, so the teenage detective switches identities with a friend to solve the case.
