Gertrude Chandler Warner

While staying at a hotel in New York City, the Aldens investigate a series of annoying pranks plaguing the management and guests.

When the Alden children accompany their grandfather to the Snow Haven Lodge, a series of odd occurrences threaten to disrupt the annual winter games.

The Aldens begin their adventure by making a home in a boxcar. Their goal is to stay together, and in the process they find a 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.

The Aldens investigate when the new coach of their community basketball league has her Most Valuable Player trophy stolen.

Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and an exciting new exhibit to explore—from behind the scenes—at their local zoo.   But disaster strikes when a pair of rare ferrets is stolen. The two huge California condors are the thief's next target. The Aldens quickly decide that the animals are being taken by someone that works in the zoo. But how do they stop a thief

...

The Boxcar children investigate when ice cream and other items start disappearing from their favorite ice cream parlor.

The Boxcar Children investigate a mysterious ghost with a glowing pumpkin head at a friend's farm.

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

The entire town of Yellow Sands is left puzzled by a mysterious fire.