101 Ways to Die - R. J. Blain - Bog

Officer McMarin of the NYPD is in for the ride of her life when the Chief Quinns storm into her station, promote her to the rank of detective, and relocate her to Manhattan. Saddled with the dubious honor of being Chief Bailey Quinn's primary rider is only the beginning of her woes.
Her first case delves into the dark waters of the many ways in which a person can die.
At the heart of the mystery is one Alec Mortan, a forensic accountant with a knack for being at the wrong place at the wrong time. Witnessing so much death is hard on a soul, and she can't help but admire his tenacity and desire to help her uncover the truth.
When the forces of the heavens and the many hells involve themselves in the case, McMarin's beliefs and skills are put to the test. If she's not careful, she'll lose her witness to fate right along with her chance for a happily ever after.