The Killing Cold Book 8 by Tess Gerritsen

After an accident on a snowy mountain road, Dr. Maura Isles and her friends are forced to seek refuge in a village with the bizarre name Kingdom of Heaven. This place is not marked on maps, there is no electricity and no mobile communication... And there is not a soul around - only twelve identical houses, unlocked, with open windows, untouched frozen food on the tables and the same portrait of a dark-haired man with a piercing gaze in each living room.