Joe and Frank piece together clues connecting a local bank robbery and the kidnapping of two friends. A series of bizarre events in their home town lead the Hardy Boys on a trail of robbers and kidnappers.

Cam and her friend Eric chase the thief of Aunt Katie's wallet through an amusement park and find themselves involved in another case requiring their special detective skills.

America's Sherlock Holmes in sneakers continues his war on crime in ten more cases, the solutions to which are found in the back of the book.

Nate and his dog Sludge are determined to find the recipe for his mother's monster cookies.

A collection of three Cam Jansen summer camp mysteries in which Cam Jansen and her best friend are spending three weeks at Camp Eagle Lake, where they play sports, do crafts, and solve three mysteries.

Idaville's secret weapon against lawbreakers, ten-year-old Leroy "Encyclopedia" Brown, helps the police force solve ten new cases, the solutions to which are found in the back of the book.

When she notices some bones missing from a dinosaur skeleton exhibited in the museum, a young girl with a photographic memory tries to discover who has been taking them and why.

To celebrate her birthday, George is taking Nancy and Bess on a bike tour around Mystic Lake, but when their tour guide disappears and unknown adversaries steal their supplies and slash their tires, Nancy begins looking for clues.

Nancy attempts to solve the mystery of the strange tapping sounds in the home of a retired actress.

Nate the Great investigates the disappearance of a homemade pillowcase belonging to Rosamond's cat Big Hex.