The Alden children solve a mystery and find long-lost treasure which belongs to an old Indian woman.

Falsely accused of plotting to overthrow King Claudio, scholarly Mangus the magician, along with his street-smart servant boy, Fabrizio, face deadly consequences unless they can track down the real traitor by the stroke of midnight.

The Alden children save an old woman's house, land, and all the animals in her animal shelter from greedy contractors.

A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.

While sightseeing at the Alamo, the Boxcar children investigate the disappearance of a priceless ring from the Alamo museum.

While helping their grandfather prepare for Greenfield's Winter Festival, the Alden children uncover a mystery surrounding the statue in the town square.

The boxcar children uncover a double mystery involving an old friend of Aunt Jane's.

Amy and Dan continue their search for the clues and cross oceans amid ruthless enemies and dangerous truths while following the trail of a famous aviator.

The Boxcar children uncover a mystery on a train trip from Boston to San Francisco.

A collection of five novels that follow the adventures of Mandie, a girl growing up in North Carolina around the turn of the twentieth century, who enlists her good friends Joe and Celia in helping her solve mysteries.