Waiting for Santa — Nancy Jill Thames

The family has gathered to celebrate Christmas at Jillian's house in Clover Hills, but Jillian's plans for a lovely Christmas Eve are rudely interrupted by a power failure.... And a homicide. Not only does Aunt Jillian find herself with a house full of company to entertain in the dark, but she also receives a call from Detective Walter Montoya who finds himself in the dark trying to solve the bizarre murder of a worker found dead in a maintenance shed at the power station. With Teddy at her side, Jillian is determined to solve the mystery.