House With Crooked Walls - Bruce Graeme - Bog

Theodore Terhune is hired to write the history of an ancient Kentish manor house for its new owner, Vincente Salvaterra, who wants to know why the house is shunned by the locals. His research reveals unsolved mysteries, and when tragedy then strikes the eccentric Salvaterra family, Terhune must determine if the cause is the house or a human agent.