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.

Investigative reporter Dirk Bones sets out to discover who is stealing books in the town of Ghostly.

On a field trip to the zoo, Cam Jansen uses her photographic memory to help solve what happened to Danny's lunch.

When a bomb threat is called in during two high-profile events, Frank and Joe Hardy have eight hours to find the bomb and track down the culprits.

Scooby, Shaggy and the gang are about to find out if the woods are haunted when the Mystery, Inc. gang goes camping.

The blatant acts of a lady swindler posing as Nancy Drew arouse the suspicion of friends and local police against the real Nancy.

Harry and Doug investigate when special bookmarks begin to disappear while their class is busy studying poetry and running their own post office.

This time Cam Jansen relies on her hearing rather than her photographic memory to find a missing classmate.

Their search for an Easter Island idol takes the Hardy boys to Easter Island and on to investigate the theft of government material in Antarctica.

Even a deep snow the week before Christmas can't keep Nate the Great and his dog Sludge from finding the special card sent to Annie's dog Fang by his mother. Even deep snow the week before Christmas can't keep Nate the Great and his dog Sludge from finding the special card sent to Annie's dog Fang from his mother.