Two brothers take summer jobs at a department store where a series of peculiar events brings them under suspicion.

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

The Alden children find mystery and adventure as they journey along the Little North Railroad in two cabooses rented for the summer by their grandfather. The Alden children find mystery and adventure as they journey along the Little North Railroad in a caboose rented for the summer by their grandfather.

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

Summer vacation on an almost private island gives the Aldens a challenge. Henry, Jessie, Violet and Benny used to live alone in a boxcar. Now they have a home with their grandfather and are spending the summer on their own private island. There is a mysterious stranger on the island with a secret--but that's not the only surprise in store for the Boxcar Children.

"Henry, Jessie, Violet, and Benny are brothers and sisters. They're orphans too, and the only way they can stay together is to make it on their own. When the children find an abandoned boxcar in the woods, they decide to call it home -- and become the Boxcar Children. -- Publisher's description.

The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

"The Boxcar Children are helping at a pizzeria, but it seems that someone is trying to shut it down. Can they find out who is causing trouble? Adapted from Gertrude Chandler Warner's story of the same name, this early reader allows children to start reading by themselves with a Boxcar Children classic."--Amazon.