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.

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

When the Aldens visit their friend Fran in Wisconsin, they can't wait to hear her tell the story of the runaway ghost. Fran's family ghost hasn't been spotted in years, but the Aldens still shiver at the spooky tale of the ghost's bell clanging after dark. Then Violet hears a mysterious ringing in the middle of the night and the children start to wonder--could the runaway ghost be back?

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.

The Aldens investigate the rumors of ghosts, disappearing props and a haunted seat in the Trap-Door Theater.

"A talented young soccer player in Greenfield is given the honor of being a child mascot at an international soccer tournament in Brazil, but when an anonymous letter insists that she doesn't deserve to go, the Aldens investigate"--

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

The Alden children have another mystery to solve when they visit a castle and must figure out which of the guests has stolen the Stradivarius violin.

The Boxcar Children have a chance to be in a real play The Wizard of Oz! Jessie is chosen for the Cowardly Lion. Benny will play a Munchkin. Even Watch has a part and all the Aldens are helping with the show. Then mysterious things begin to happen. Someone makes a threatening phone call and a costume is destroyed. Maybe the show won't go on unless the Boxcar Children can solve the mystery before opening night!

Jessie and Henry's robotics team is competing in a big tournament. But when their robot is stolen, the Aldens have a high-tech mystery to decode!