Ten brief cases in which the reader pits his wits against those of Encyclopedia Brown, an ingenious twelve-year-old detective.

While visiting Wallis's castle, Dink and his friends investigate strange noises that lead them to a dangerous secret.

Dink and his friends unearth the mysterious truth behind the envelopes incorrectly delivered to his house.

Triggered by the disappearance of a brilliant young professor, this mystery takes the Hardy boys first to Kenworthy College, where they find a puzzling message on an examination paper. But then, a new clue is unearthed that sends the young detectives to the Honeycomb Caves. After many dangerous encounters,  Frank and Joe discover a powerful searchlight in one of the craggy caverns along the seacoast. In the brilliant white glare of the searchlight,...

When Ruth Rose and her friends, vacationing in Florida, discover that her grandmother is about to invest in a project to recover sunken treasure, they stumble upon evidence that the entire plan may be a fraud.

Lunch Lady and Betty have been fired but the Breakfast Bunch convinces them to return and stop the school's new superindendent and her minions from carrying out an evil plan for revenge.

Dink and his friends use their detective skills to locate a giant emerald missing from a statue delivered to Uncle Warren's museum in New York City.

The town's ten-year-old walking encyclopedia again solves ten neighborhood mysteries. The final solutions to the cases are at the back of the book, giving the reader a chance to compare his skill to that of Encyclopedia Brown.

Nancy Drew has to find the mysterious ghost that seems to be haunting Twin Elms, and make sure no more prized possessions disappear under her nose.

Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace.