Black Heart: The Crimson Knot by TW Gallier
Approx. 73,750 words.
Published on May 12, 2013 by
Rowdy Rooster Publishing.
Sable Hart patrols the night streets of Dallas, hunting for rogue vampires. She is the undead's self-appointed sheriff — called Black Heart in the paranormal community. When a rogue vampire goes on a killing spree and kills a woman tied to the wrong undead people, the boss of the local vampire mafia tasks her with finding him. Or he will kill her entire family.