Boxcar children mysteries

Describes 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 children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

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

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.

Henry, Jessie, Violet and Benny share a mysterious island for the summer with their grandfather.

While exploring the caves around Dragon's Mouth Cavern, a series of unusual and somewhat frightening events convinces the Alden children that someone does not want them around.

Henry, Jessie, Violet, and Benny, visiting their friend Fran in Wisconsin, become suspicious when it appears that Fran's family ghost, which has not been seen in years, is staging a comeback.

Henry, Jessie, Violet, and Benny decide to investigate when someone tries to make trouble in the home of a famous inventor of one-of-a-kind clocks.

The Aldens go with their grandfather to his class reunion and investigate if a buried Civil War treasure is at Goldwin University.

The Alden kids investigate a series of break-ins and vandalization at the local recycling center, where Mrs. MacGregor has recently shown them they can find a lot of great things.