boxcar children (fictitious characters)

The Boxcar Children investigate a mystery about a rundown yellow house on Surprise Island and the man who disappeared from it.

The Boxcar Children decide to investigate when it begins to appear that the Blackwells, new neighbors who have decorated their front gate with spiders, have something to hide.

When the Aldens visit Yellowstone they discover a map showing the way to an old cabin where gold is supposedly hidden, but they encounter lots of interference in their attempts to hike the trail.

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

When they take their dog, Watch, for obedience training, the Alden children discover that some of the dogs in the class have vanished and decide to try to solve the mystery of their disappearance.

When the Alden children accompany their grandfather to the Snow Haven Lodge, a series of odd occurrences threaten to disrupt the annual winter games.

When their favorite pizza restaurant almost goes out of business, the Alden children try to help their friends stay open while they find out who is behind all their problems.

When the Alden children spend a week visiting at Pilgrim Village, they uncover the mystery behind the unusual happenings at the historic site.

The Aldens get involved in questions about a boy's unusual behavior after they rent a lighthouse.

The Alden children suspect that the other guests are somehow involved when things begin to disappear at the bed and breakfast where they are staying in Washington, D.C.