Eternally Yours. The Afterlife Series, #1

If they weren't already dead, working together would probably kill them. After one too many disappointments, Jodie Devlin took her own life. Until a new future can be created for her, she serves as one of Death's bounty hunters, retrieving souls who haunt Earth. She'll need smarts, charm, and trickery to convince these specters to give up the ghost and move on. These same skills come in handy for dealing with her bull-headed, know-it-all trainer.
Luc Asante's wife ordered him taken off life support, condemning him to employment in the Afterlife. Now he's saddled with a trainee who's as soft-hearted as he is hard, as impulsive as he is methodical. In a place where perfection is the norm, she flaunts her flaws just to drive him nuts. When the two confront the secrets of their past, only the ultimate sacrifice can save them both.