Hell-Knights. Arcana Europa

Decima is a centuries-old Italian city on the water, a vanity project meant to be a fairy tale escape for the titled and the privileged. But something in the distant past had turned it into a murky, putrid dreamscape instead, a crumbling city haunted by a scourge of revenants whose origins and purpose now seem destined to be hidden in the shadows forever. Not even the brave, dogged attempts at fighting midnight creatures by the descendants of a select bloodline can rid the city of the near-daily threat.
Michele De Santis is a young minor sorcerer, a reluctant champion who, along with his twin sister and his cousin, has lost too much through the years and has resigned himself to a life of endless midnight hunts while selling healing and protection spells and artifacts during the day. A life of loneliness, of a forced solitude in a desperate bid at keeping collateral damage at a minimum appears to be his only future.
When long-dead corpses suddenly turn without vampire bites, logical patterns no longer hold true, leaving the weary hunters baffled and unsure for the first time. Decima's bronze guardians fall silent for no reason, a dark, binding spell muting their warnings. A long-abandoned church shows signs of life in the most grotesque ways imaginable. And everything seems to point to an unknown threat, one that's long lain dormant but has been awakened by the arrival of a young English heir and his amateur antiquarian uncle.
Romance and the gothic layer Hell-Knights with the dark, rich textures of an alternate universe Europe, a nineteenth century world where magic reigns supreme, and love knows no gender.