Haven't read it, so here's blurb from amazon:
"'You're a librarian, not a detective,' Catherine Penny's daughter reminds her. But Catherine, suddenly single in her 60s, finds it easy to slip into sleuthing mode when she leaves behind New York City and a failed marriage for a lovely 17th century cottage in the idyllic English village of Far Wychwood.
"But behind the town's quaint stone walls and lace-curtained windows lurk dark secrets and whispers of witchcraft."