Merry And Bright - A Very Krampus Christmas. The Seattle Coven Tales, #5

Steven and Hu Metcalf are hoping to spend a quiet holiday in a remote mountain town with their ten-year-old son, but beneath the Christmas cheer and festive lights, an ancient power stirs. Children have begun to vanish, and the townspeople whisper an ancient name: Krampus. As a snowstorm seals the town off from the outside world, every hour brings them closer to danger. But even in the darkest winter, hope flickers.
Determined parents, unlikely allies, and buried truths may hold the key to bringing the children home... if they can face what stalks the blizzard. An atmospheric holiday nightmare, MERRY AND BRIGHT is the fifth book in the Seattle Coven Tales, hailed as "the must-read supernatural series of the year" by N. N. Light's Book Heaven.