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 visit the town of Sleepy Hollow, where it seems that the Headless Horseman has returned. Can the Boxcar Children find out what's going on before the ghost tours are ruined?

A friendly writer with a metal detector, the mysterious inhabitants of a tower house, and the discovery of a locket in the sand are ingredients for the Aldens' latest mystery.

When the Aldens have the chance to work at a candy factory, they try to find out who is sabotaging the candy and why.

Henry, Jessie, Violet, and Benny have never been to a drive-in movie theater before, but they_re visiting a friend who owns one. The children love to eat popcorn in the car and watch movies under the stars. But strange pranks are disrupting the fun_one night the sound system starts playing loud music during the movie, and a couple of the theater employees seem to be hiding a secret. Then, late at night, a ghost is seen walking around the empty grounds...

The Alden children stumble upon a mystery when they enter their dog, Watch, in a contest that could lead to fame and fortune, but where things keep going wrong.

While visiting an old mansion, the Aldens investigate the possibility that it may be haunted. Includes games and activities after text.

When their favorite pizza restaurant almost goes out of business, the Alden children try to help their friends stay open while they find out who is behind all their problems.

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.