mystery and detective stories

Young Frank and Joe Hardy enlist the help of their friends to solve a mysterious case involving a large number of frogs.

When the Aldens visit Yellowstone they discover a map showing the way to an old cabin where gold is supposedly hidden, but they encounter lots of interference in their attempts to hike the trail.

A picture clue story in which Scooby-Doo and the gang investigate to solve the mystery of Billy's missing tooth.

Nancy Drew and her friend Bess search for suspects when the director of an arts colony, housed at the grand old Pennington estate, receives a disturbing threat.

The Alden children solve a mystery and find long-lost treasure which belongs to an old Indian woman.

In 1968, with the Vietnam War raging, thirteen-year-old Lyza inherits a project from her deceased grandfather, who had been using his knowledge of maps and the geography of Lyza's New Jersey hometown to locate the lost treasure of Captain Kidd.

Teen sportswriters Stevie Thomas and Susan Carol Anderson are assigned to cover the football game between long ime rivalries Army and Navy, and, after noticing the actions of secret service agents, they begin to suspect that the president, who is going to attend the event, is in danger.

Psychic twins Toni and Mika wind up in big trouble when they decide to investigate the unsettling news that Chris, Mika's long-time crush, has become engaged to the maniacal Marie.

Psychic twins Toni and Mika run into trouble when they rush to save their friend Emma from her evil long-lost twin Marie, only to have Marie steal the magic necklace that controls their supernatural powers.

When her boyfriend is arrested and charged with murdering the school guidance counselor, seventeen-year-old Ashlyn tries to find the real killer.