The Bleeders, Series by Michaela Haze, Katie Edwards, Anna Judson

Soho barmaid, Fia Taylor, unwittingly hires a hitman to kill the two murderers of her sister Melanie - only to find that Henry Blaire, the man she hired, is a centuries old incubus with a lust for human life and a mission to end anyone that knows his secret. Fia must run for her life. Will she survive? That is not the question...why does she end up in an insane asylum, muttering only his name? That is the more pressing matter...