Whose Body?

First published in 1923, ‘Whose Body?’ is a mystery novel by Dorothy L. Sayers, an English crime writer, and poet. She is best known for her mysteries, a series of novels and short stories set between the First and Second World Wars that feature English aristocrat and amateur sleuth Lord Peter Wimsey.
There's a corpse in the bathtub, wearing nothing but a pair of pince-nez spectacles. Enter Lord Peter Wimsey, the original gentleman detective. Insisted to investigate by his mother, the Dowager Duchess of Denver, Lord Peter quickly authenticates that the sudden disappearance of a well-known financier is in some way connected to the body in the bathroom. But discovering exactly which way they are related leads the amateur detective on a merry chase.