Gertrude Chandler Warner

The Alden children uncover a plot to sabotage the Greenfield Bears baseball team. Includes baseball puzzles and activities.

While visiting Chicago with their grandfather, the Alden children begin receiving mysterious clues to a treasure hunt.

While sightseeing in Niagara Falls, the Boxcar children investigate a rash of souvenir store thefts. Includes related puzzles, games, and activities.

While visiting a friend in New York City, the Aldens investigate the theft of a valuable diamond.

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 investigate a mystery involving a legendary mining expedition to the gold fields of Alaska.

The Aldens investigate to see if the ghost of an alligator is haunting the Louisiana bayou.

Henry, Jessie, Violet, and Benny decide to investigate when they travel with their grandfather to buy honey at the Sherman's honey farm only to discover that the bees, for some reason, have quit making honey.

The Aldens visit an old camp in Quebec, Canada, and begin to suspect that someone or something is trying to scare them away from the place.

The boxcar children: Four orphaned siblings set up housekeeping in an abandoned boxcar because they think their grandfather is mean; but after becoming acquainted with him, they realize he is a nice man and they move into his house and live happily ever after. Surprise Island: The Alden children spend living on their grandfather's island. The yellow house mystery: Relates the exploits of the four Alden children as they locate a missing man. The...