Still blaming himself for the mysterious disappearance of his sister five years earlier, seventeen-year-old Fox Mulder moves to Washington D.C. with his father where the death of a local boy and the abduction of another draw him into the world of a serial killer.

Dashiell Gibson, who lives on Moon Base Alpha, has to solve a murder of one of the moon's most prominent doctors--

When a scientist working on a top secret invisibility suit goes missing, Alice puts her detective skills to the test to determine if Dr. Lerner disappeared with help from his invention or more sinister means.

When new team members are being kidnapped and threatened, Frank and Joe join the basketball team at the request of their principal to uncover the culprits.

Ted Hammond, the only sixth grader in his small Nebraska town's one-room schoolhouse, searches for clues to the disappearance of a homeless family.

When Tommy Smyth, a high school junior and particle physics genius, goes missing, multiple lives intersect--or don't--as the residents of a small Texas town relate, in their separate voices, what each thinks might have happened to Tommy.

When her pet dachshund, Scooter, goes missing, Maryellen decides to go looking for him, a search which leads her to the rocket launchpad at Cape Canaveral.

Olivia's parents were killed fourteen years ago. Now, new evidence reopens the case . . . and she finds herself involved--

When Marvin asks middle-school detectives Howard Wallace and Ivy Mason to prove his nephew, bully Carl Dean, innocent of taking the school mascot, complications arise that could pull them apart.

Visiting a ranch and commune in California Gold Rush country, Julie stumbles on a mysterious message that hints at long-lost treasure and she endeavors to find it before trouble shows up.