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

When a famous millionaire asks young detectives Max and Maddy Twist to investigate who is sabotaging an international balloon race for charity, they find themselves competing against world-renowned balloonists--and one old nemesis.

When Rosamond's birthday gift for Nate disappears from her sled, the boy detective decides to unravel the mystery.

Nancy Drew becomes involved in a double mystery concerning a haunted bridge and jewel thieves.

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.

Nancy helps an elderly woman find her long-lost grandson, who is actually the deposed prince.

"Cam Jansen must use her photographic memory to find two missing goldfish."--

Junior sleuth Jeffrey Bones and his grandfather enjoy a day at the amusement park until their tickets to ride the giant roller coaster mysteriously disappear.