Murder Is for Keeps by Elizabeth J. Duncan

While painting a watercolor at Gwrych Castle, Penny Brannigan discovers the dead body of local resident, John Hardwick. Hardwick and others had been working on the gardens of the long-vacant and crumbling estate. Not knowing if he died of natural causes or more sinister means, the police have their hands full when human bones are discovered on the property. Penny and her friend, recently retired DCI Gareth Davies, are fascinated with the history of the castle and find themselves involved in both cases. I always look forward to reading the newest book in the Penny Brannigan series because of the characters and the small town setting of Llanelen, Wales.