Warner, Gertrude Chandler

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

The Aldens search for carousel horses that have disappeared from an amusement park.

While staying at an eighteenth-century inn in Vermont, the Boxcar children become curious about the mysterious "accidents" that keep plaguing the owners.

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.

Two brothers take summer jobs at a department store where a series of peculiar events brings them under suspicion.

"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!"--Back cover.

"The Aldens are helping out at a doughnut shop, but when a rival store opens across town, strange events follow, and the children have a mouthwatering mystery to solve!"--OCLC.