Sweet Revenge by Diane Mott Davidson

The New York Times bestselling author of Dark Torte and Double Shot delivers another knockout novel Goldy Schulz is thrilled to be catering a holiday breakfast feast for the staff of the Aspen Meadow Library. But her merriment goes cold when she spots a woman lurking in the stacks—a woman with a striking resemblance to Sandee Brisbane. The Sandee Brisbane who shot and killed Goldy’s ex-husband, the Jerk. It sure looks like her, but it can’t be because Sandee is dead. Or so everyone believes.