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Carolyn Keene
Carolyn Keene is the pseudonym of the authors of both the Nancy Drew Mystery Stories (and a spin-off called River Heights) and The Dana Girls Mystery Stories, both produced by the Stratemeyer Syndicate.
The clue in the old stagecoach / The clue of the broken locket
Synopsis
Teenage detective Nancy Drew tackles two classic mysteries in this volume. She hunts for a hidden treasure linked to an old stagecoach and investigates a strange haunting at a summer camp involving a broken locket. Nancy must use her wits to track down clues and solve these puzzling cases before it is too late.