The Alden children hunt for their late grandmother's necklace that has been missing for years.

The mysterious disappearance of a reclusive neighbor's cat involves the Boxcar children in some complicated detective work.

While staying at the Crooked House, the family home of their housekeeper Mrs. McGregor, the Aldens try to solve a riddle that will lead them to a hidden treasure.

While the Aldens are visiting a friend of Grandfather's at the beach, Benny finds a long-lost piece of a map to a legendary pirate treasure, a discovery that brings unwanted attention from fortune hunters.

Someone is mixing up signs, switching off electrictity, and endangering the animals' lives at the zoo. If the Boxcar Children want to save the animals, they'll have to solve the mystery.

The Boxcar Children
Henry, Jessie, Violet, and Benny, four orphaned siblings, suddenly appear in a small town. The children make a home for themselves in an abandoned red boxcar they discover in the woods. Ambitious and resourceful, the plucky children make a happy life for themselves—until Violet gets too sick for her brothers and sister to care for her.

Surprise Island
Adventure abounds as Henry, Jessie, Violet,...

"The Aldens are helping out at a harvest festival in a town at the foot of the Rocky Mountains. But something in the hills is scaring people away! Are the local rumors about a werewolf true?"--Back cover.

When a professional hockey player comes to Greenfield with plans to build an ice skating rink, the Alden children suspect that someone in town wants to stop the project.

The Aldens try to find the thief who stole a very rare teddy bear.

The adventures of the Alden family as they ride across country in a caboose that has a strange history--or is it a mystery?