I, Angel (Angels in L.A. #1) by JC Andrijeski

Dags Jourdain never asked to be an angel. No one warned him about the chaotic mess of powers he’d inherit. Or that he’d black out every time he flew, waking up naked in random places. Or that he’d randomly start fires. Or that every time he picked up a weapon, there was a good chance someone dies. Now Dags works as a P.I. in Hollywood, California. He also hunts demons. Thanks to a particularly nasty one on Hollywood Boulevard, Dags accidentally saves the life of a movie star, and it turns his life upside down. Paranormal Mystery Romance.