At B&N (& probably smashwords): The Dead Love Longer by Scott Nicholson
Private investigator Richard Steele must solve his most difficult case ever—his own murder—while caught between women on both sides of the grave. In a race against time as his spirit slips away, Richard must confront his many, many failings and trust in a power beyond his understanding--love. His only weapon is faith, and he's running out of bullets. It's going to be a hell of a showdown.