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.

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.

The Hardy brothers try to find out who is behind a rash of automobile thefts that are occurring on Shore Road just outside of Bayport.

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

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.

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.

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.

When Cam's grandparents are robbed on their way to her parents' surprise birthday party, Cam uses her photographic memory to solve the mystery.

Inspector Hopper and his perpetually hungry assistant McBugg solve three mysteries for their insect friends.

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