Murder at Mallowan Manor — Lesley Cookman

It's the run-up to Christmas, Libby Sarjeant and her friend Fran have been invited to stay at grand old Mallowan Manor to investigate some mysterious rumours which are preventing the owner from selling up. A weird cast of characters, including an ageing actress and an enigmatic butler, makes Libby feel like she's ended up in an Agatha Christie plot ...