Broken Ivy. Ivy Frost, #1

With the sudden death of her twin brother at the hands of vampires, Ivy Frost vows revenge on the creatures of the night. Her vow transforms her from a young woman in polite Victorian England to a vampire hunter, stalking the nights. Shortly after her change, she is sent to a small northern town, where she discovers perils and pain she never imagined possible. The town of Warton is home to master vampire, Sir Vincent Sheldrake, who Ivy encounters shortly after arriving.
They must work together despite their differences to combat a greater threat to the town; a cruel and twisted vampire with his own plans for vengeance. Her structured notions of good and evil deteriorate as she finds kindness and love where she did not expect it, and experiences the wickedness of humans; the very people she had vowed to protect. From haunting cemeteries to inside the walls of Bedlam Asylum, Ivy discovers the life of a vampire hunter is not as simple as she once thought.
But the discovery may not be in time to save those who need her from a grave of their own.