Wages of Sin by Alex Beecroft

A novella, available either on its own in ebook from MLR Press or as part of the three novella print anthology "The Mysterious" along with stories by Josh Lanyon and Laura Baumbach available from Amazon and good book shops.

Charles Latham, wastrel younger son of the Earl of Clitheroe, returns home drunk from the theatre to find his father gruesomely dead. He suspects murder. But when the Latham ghosts turn nasty, and Charles finds himself falling in love with the priest brought in to calm them, he has to unearth the skeleton in the family closet before it ends up killing them all.