Death of a Snob by M.C. Beaton

Murder in Paradise...When Jane Wetherby offers PC Hamish Macbeth a holiday at her 'Happy Wanderer' health farm on the isle of Eileencraig, he is more than happy to accept. Unfortunately the visit doesn't prove to be the pampering experience he had been hoping for. Windswept Eileencraig is inhabited by hostile islanders, many of whom would be more than happy to be rid of the 'Happy Wanderer' and its proprietor. And the company at the health farm is hardly better. The volatile party includes an ex-husband, an illicit lover, and Morag Todd, an unadulterated snob who criticizes everybody and everything. So when Morag is found lying at the foot of a cliff with a broken neck, no one seems too broken up about the event -- leaving it up to Hamish to solve the death of a snob.