Another late post! I felt like reading a Sayers classic, and picked Unnatural Death up from the shelf. In this story, Lord Peter Wimsey investigates the death of a sick, elderly lady--and if I say any more I'll spoil the story. It's a good one, though--Dorothy Sayers has never been bettered.
The title has gone through plenty of printings, of course--this ugly cover is the one I own.