The Remains in the Rectory. Viola Roberts Cozy Mysteries, #6

While touring the Cotswolds of England, Viola Roberts and her boyfriend, Lucas Salvatore, are stranded by a downpour of epic proportions. The quaint village of Chipping Poggs has only one inn, and just their luck, it's a haunted mansion. Viola tries to make the best of her rainy vacation by "ghost hunting" and poking her nose where it doesn't belong. Until she pokes it right into the middle of a murder.
With the village cut off by flooding from the violent storm, Viola naturally starts sleuthing. But when a second guest is found dead, and then a third body shows up, Viola's own ghosts might be telling her it's time to turn in her gumshoes.