A fifth-grader with a photographic memory and her friend Eric help solve the mystery of the stolen diamonds.

Trouble plagues a student tour through Europe as Nancy becomes involved in a plot to smuggle refugee children across the Austrian border from Eastern Europe.

When a woman's poodle disappears during a boat ride around the city, Cam uses her photographic memory to solve the mystery.

Cam Jansen and her best friend are spending three weeks at Camp Eagle Lake, where they play sports, do crafts, and solve three mysteries.

The Hardy brothers embark on a freighter trip under mysterious circumstances and find themselves involved with a smuggling ring.

Harry and his detective classmates try to find clues relating to a mysterious locked closet in Room 3B.

Nancy Drew and her two friends help uncover a gang of swindlers while vacationing in a seaside town.

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.

Dink, Josh, and Ruth Rose help catch the thieves who have stolen the treasure from the museum's mummy exhibit.