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.

While visiting Pikesville, the Boxcar Children join the exciting last games of the season in a strange old ballpark behind an abandoned factory. But the Eagles are hitting too many home runs. Could they be cheating? Then Violet sees strange lights in the factory. Could the lights--and the home run streak--have anything to do with the sad Pikesville legend of Home Run Herman?

A family, snowbound in a vacation cabin, discovers adventure in surrounding wild life, three children they find in the snow, and a search for a lost recipe.

Following clues provided by the secretive Reddimus Society, the four Alden siblings travel to a dingo sanctuary in Australia and to Shakleton's hut in Antarctica to deliver the fifth and sixth artifacts, and then they work to unmask the traitor traveling with them.

Four orphaned and homeless siblings happen upon an abandoned boxcar, which, with a little creativity and hard work, they gradually furnish with all the comforts of home. Fearful that they will be sent to live with the reputedly cruel grandfather they have never met, the children keep their new home a secret.

Henry, Jessie, Benny and Violet Alden discover that a mystery surrounds the run-down yellow house on Surprise Island. The children find a letter and other clues that could lead them on the trail of the man who vanished from the house.