Whose Body? by Dorothy L. Sayers*

A naked body only wearing pince-nez is found in Mr. Thipps' bathtub.  When Lord Peter Wimsey's mother, a duchess, hears about this shocking event, she calls her son to investigate.  His observation skills and intellect are put to test as he analyzes the how, the who and the why. 

Meanwhile, Sir Reuben Levy has disappeared.  Parker, a police investigator, joins Wimsey in the investigation, initially thinking the body in the bathtub was Levy.

Since I mostly read this novel for a few minutes before bed each night, I sometimes struggled keeping the different characters straight in my head (no fault of the author). 
I thoroughly enjoyed this mystery first published in 1923 (the British charm, humor and wit).
*Highly recommend.
-Borrowed via Inter Lib. Loan