Recipe for a perfect village murder mystery: Start with one pristine British hamlet, stir in the murder of the local police chief, add a shrewd local member of the clergy and a detective from Scotland Yard; season with a dash of clandestine romance. In her latest, Deborah Crombie cooks up the perfect example of the genre. In this offering the hamlet is called Holmbury St. Mary, the murder victim was a widely-hated bully and the vicar is a woman. A delicious concoction.