The Alden children discover clues that could help them figure out why a man vanished from a run-down yellow house on Surprise Island.

The children are spending the summer on their own private island but there is a mysterious stranger on the island.

A family starts out on a one-day mountain climbing excursion that becomes very exciting. In fact, it becomes an adventure for the former "boxcar" family. They unearth some mysteries and have a fine time in the process.

Violet and Jessie begin an adventure when they journey to Centerville to keep Aunt Jane company on the family ranch.

At an old library, the Alden children discover a boy who needs their help and a stranger who is after a valuable object they found in the library.

The Boxcar children investigate when ice cream and other items start disappearing from their favorite ice cream parlor.

The Aldens search for carousel horses that have disappeared from an amusement park.

The Aldens, while testing the latest version of their favorite computer game, are surprised to find messages directed specifically at them.

Six children help solve the mystery of a missing spyglass that has kept two brothers feuding for years.

"The old abandoned school in Silver City is being fixed up as an art center and the Boxcar Children volunteer to help clean up the place. But the other volunteers are scared by the spooky goings-on in the school--doors lock by themselves, and chalkboard messages appear out of nowhere! Will the Aldens find out the secret of the haunted school?"--