"On a farm, the Aldens find their oldest mystery yet! Adapted from Gertrude Chandler Warner's story of the same name, this early reader allows children to start reading with a Boxcar Children classic."--

The Aldens search for carousel horses that have disappeared from an amusement park.

The Alden family embark on a trip to an uninhabited South Sea Island. Mike Wood joins them for a holiday full of adventures planned by grandfather. On the island someone seems to be with them. Besides solving the mystery, they have a fine time living so far from civilization.

While on a bicycle trip to their aunt's farm, the four Aldens help solve a mystery.

The Alden children save an old woman's house, land, and all the animals in her animal shelter from greedy contractors.

At the same time that the Alden children's efforts to raise money for a new hospital wing are being sabotaged by nasty tricks, they find their attempts to befriend the new girl Beth frustrated by her strange behavior.

"The Alden children help solve a case surrounding missing vegetables and vandalism in the community garden"--

"The Alden children are fixing up an old castle that will be turned into a museum, but they have to solve the mystery hidden within the castle's walls"--

The Aldens try to help a visiting Russian gymnast who is surrounded by mysterious people and events and who seems to have a secret.

When the Alden children go camping on Blizzard Mountain, a place said to be inhabited by a ghost looking for buried treasure, they begin to think someone or something is trying to scare them off.