A Brazen Curiosity (Beatrice Hyde-Clare Mysteries)

England 1816
Twenty-six-year-old Beatrice Hyde-Clare is far too shy to investigate the suspicious death of a fellow guest in the Lake District. A spinster who lives on the sufferance of her relatives, she would certainly not presume to search the rooms of her host's son and his friend looking for evidence. Reared in the twin virtues of deference and docility, she would absolutely never think to question the imperious Duke of Kesgrave about anything, let alone how he chose to represent the incident to the local constable.

And yet when she stumbles upon the bludgeoned corpse of poor Mr. Otley in the deserted library of the Skeffingtons' country house, that's exactly what she does.