One warm night four children stood in front of a bakery. No one knew them. No one knew where they had come from. Henry, Jessie, Violet and Benny are orphans.They discover an old red boxcar that provides them shelter from the storm.

Henry, Jessie, Benny, and Violet Alden meet Mike Wood and a strange chain of events begins. Mike's house is mysteriously burned down, a man in a blue hat appears, and the Alden's uranium mine is in danger of being sabotaged. The four youngsters solve the mystery.

A summer spent in doing light housekeeping in a lighthouse proves to be a happy and adventurous time for the Boxcar children, as well as for their neighbor, Larry Cook, who does not want any friends.

A dangerous rockslide...a mountain cave...a secret treasure--there are many adventures in store for the Boxcar Children.

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

The Alden family rents a houseboat to drift down the river, and encounters a mystery in the little towns along the river, involving a fast black car.

The Alden children are helping their new neighbors build a tree house when they discover an attic window that not even their neighbors knew about.

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

Four orphaned children run away and live in a boxcar, until they are found by their grandfather.

The boxcar children travel to Maine, take canoes into the wilderness and live in a house exactly like the one on Surprise Island, except the Maine house is brown, not yellow. They untangle the mystery of the two houses. Relates the exploits of the four Alden children as they locate a missing man. The Boxcar children are determined to solve the mystery that surrounds an old yellow house on their grandfather's property. Strange things have happened...