When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

In the late 1800s, a twelve-year-old nightspirit living in the Great Smoky Mountains despairs as homesteaders destroy her forest habitat, until a chance encounter with a "day-folk" man changes everything she thought she knew about her people--and their greatest enemy.

Although filled with anger over her parents' disappearance, eleven-year-old Sabrina Grimm--along with her grandmother, sister, and several fairy-tale characters--tries to discover who has killed her teacher.

Thirteen-year-olds Cooper Goodman and Justice and Liberty Gordon investigate the eccentric residents of Windy Bottom, Georgia, after the remains of Coop's long-missing grandmother are uncovered and his Gramps is the prime suspect.

A black family of five moves into an enormous house once used as a hiding place for runaway slaves. Mysterious sounds and events as well as the discovery of secret passageways make the family believe they are in grave danger.

The mysterious death of an eccentric millionaire brings together an unlikely assortment of heirs who must uncover the circumstances of his death before they can claim their inheritance.

The Aldens are visiting Port Elizabeth when a bad storm rolls in, knocking out the power--and leaving behind a mystery! Can the powered-down Aldens figure out what's going on?

Teenage detective Nancy Drew uses her courage and powers of deduction to solve the mysterious happenings in an old stone mansion.

On a whale watch, Meg tries to solve a puzzling case involving a stolen treasure map. The reader is asked to solve the mystery before Meg, using clues found in the text and illustrations.

While coping with his parents' separation, eleven-year-old Skeet spends most of Spring Break in his skiff on a Florida river, where he finds a manatee shot to death and begins looking for the killer.