Scarlet Ashes

Dominica Salvatore has spent her life as a nightmare whispered through vampire ranks. Known as the Reaper, she is a lethal hunter driven by duty, vengeance, and an unbreakable code: show no mercy. Armed with her ring daggers and a reputation soaked in blood, Dominica exists for one purpose: to eradicate vampires wherever they hide. All except one. Xavier Valin has watched vampire kings rise and fall over his four centuries of life.
Offered the throne more than once, he has always refused it, choosing freedom over power. But as war erupts between hunters and vampires, Xavier finds pleasure in the chaos and in the hunt for the one hunter who ignites something dangerous inside him. He calls her Little Deadly. He's tasted her blood once, and the memory has never left him. When deception fractures both hunter and vampire ranks, Dominica and Xavier are pulled back into each other's orbit.
Their chemistry is volatile, irresistible, and unforgivable. To give in would mean betraying everything they've ever sworn to protect. Then comes the ultimate command: Kill each other. or die trying. As the line between enemy and desire blurs, Dominica and Xavier must decide whether love is worth defying centuries of hatred, and whether survival is possible when the world demands one of them fall.