The mysterious disappearance of a reclusive neighbor's cat involves the Boxcar children in some complicated detective work.

When they help out at a guide dog training school, the Alden children meet several people who seem obsessed with a particular dog named Ginger.

The Boxcar children investigate the disappearance of a student's research paper from an observatory and the subsequent disappearance of another student.

Someone is mixing up signs, switching off electrictity, and endangering the animals' lives at the zoo. If the Boxcar Children want to save the animals, they'll have to solve the mystery.

The Boxcar Children
Henry, Jessie, Violet, and Benny, four orphaned siblings, suddenly appear in a small town. The children make a home for themselves in an abandoned red boxcar they discover in the woods. Ambitious and resourceful, the plucky children make a happy life for themselves—until Violet gets too sick for her brothers and sister to care for her.

Surprise Island
Adventure abounds as Henry, Jessie, Violet,...

The Aldens try to find the thief who stole a very rare teddy bear.

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 Aldens' dog, Watch, comes across a box with a note inside and soon the children are looking all over town for cleverly hidden boxes.

"The Aldens visit the shore in New Jersey and help out at an amusement pier that is rumored to be unsafe"--