A Singular Mission — Judith Campbell

No. 7 in the Olympia Brown Mysteries. Olympia accepts a winter contract in a picture-book church on Cape Cod, but someone in that idyllic setting is watching and waiting. When Olympia is trapped inside the old church along with her stalker in a killer New England blizzard, husband Frederick is too far away to help, and the police can't reach her. Olympia becomes both the hunter and the hunted, and only she or the predator will survive the night.