Dandy Gilver and a bothersome number of corpses

the long version

"A mystery writer perfect for fans of Upstairs Downstairs, Downtown Abbey, and Gosford Park, Catriona McPherson has charmed readers everywhere with her fun and clever series set in 1920s Scotland. In this new adventure, witty, aristocratic sleuth Dandy Gilver travels to an all-girls school in the small seaside town of Portpatrick to investigate the disappearance of a childhood friend who taught there. Soon, Dandy discovers that her missing chum is not the only thing that's off in Portpatrick. Other teachers have been disappearing at an alarming rate. The BBC has optioned the Dandy Gilver series for television, and mystery fans will love this newest excursion with Scotland's most charming sleuth"--