I recently started rereading the Peter Shandy series by Charlotte MacLeod. I last read them in high school and I had forgotten just how good they are.
Rest You Merry
Professor Peter Shandy of Balaclava Agricultural College comes back from an abbreviated Christmas cruise to find his next door neighbor, and wife of his best friend, dead in his living room. Some things don’t seem to add up to him, and with the help of Helen Marsh (who’s been requisitioned to take care of the victim’s house while his friend visits his daughter in California) Shandy tracks down the responsible party.