On the Graveyard Shift — Carolyn J. Rose

Magnolia Duval is charming, sexy, and wealthy. She's also a black widow. She mates and she murders. And she's bent on luring the man Emma Preston loves into her web.With the help of her dearly departed friends, The Three Shades of Justice, Emma sets out to save Spencer and stop Magnolia. But the widow has her own posse of phantoms—the angry ghosts of the men she killed.A graveside showdown looms and, for the first time in their afterlives, the Three Shades of Justice are afraid. They're outnumbered and outmatched. But can they be outwitted?