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

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

While visiting a friend of their grandfather's on Sullivan's Island, off the coast of South Carolina near Charleston, the Boxcar Children encounter mysterious activities related to rumors of a buried pirate treasure.

The Aldens take part in a hunt at a gem mine and discover that someone is out to sabotage the contest.

The Aldens are spending a week at Camp Seagull on beautiful Claw Island. But as soon as camp begins, they realize that someone is not playing fair. Everything begins to go wrong for the Aldens they lose their luggage, Henry misplaces the camp flag, and the campers on the other team use one of Jessies ideas to score points for themselves. Are some campers so desperate to win the Olympics that they are willing to cheat? The Boxcar Children are...

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.

When they take their dog, Watch, for obedience training, the Alden children discover that some of the dogs in the class have vanished and decide to try to solve the mystery of their disappearance.

The Boxcar children uncover a mystery on a train trip from Boston to San Francisco.

While the Aldens are visiting a friend of Grandfather's at the beach, Benny finds a long-lost piece of a map to a legendary pirate treasure, a discovery that brings unwanted attention from fortune hunters.

When the Alden children set out to solve a jewelry store robbery, they find they must also deal with a mysterious thief who steals their favorite cereal.