Death of a Liar by M.C. Beaton

Policeman Hamish Macbeth again finds himself juggling several murder investigations, despite being stationed in the small Scottish village of Lochdubh.  This time, a local couple, who recently moved to town are found murdered along with Liz Bentley, who had a hard time telling the truth. Hamish tries to solve the crimes, even after being warned by his superiors to not get involved and knowing that, if he succeeds, it might mean a career away from his beloved Lochdubh.  It will be published in February.