Lord Peter Wimsey and Harriet Vane marry and go to spend their honeymoon at Talboys, an old farmhouse in Hertfordshire which he has bought her as a present. The honeymoon is intended as a break from their usual routine of solving crimes (him) and writing about them (her), but it turns into a murder investigation when the seller of the house is found dead at the bottom of the cellar steps with severe head injuries.

Busman's Honeymoon is a 1937 novel by Dorothy L. Sayers, her eleventh (and last) featuring Lord Peter Wimsey. It is the fourth and last novel to feature Harriet Vane.