Forbidden Half-Blood by Madeline Hill

Sadie Bell is done hunting monsters.
After barely escaping her last battle with her life, Sadie knows it’s time to back away from her job hunting vampires and werewolves.
One problem—she never expected a hot half-blood to crash into her life, fangs and all.
Michael Blakely is nothing but trouble, but when Sadie saves his life and he returns the favor, the two are bonded. It’s temporary, but that doesn’t make it any less intense.
With a horde of powerful vampires out for blood—literally—Sadie and Michael have no choice but to join forces.
Like it or not, the pair is bonded in more ways than one—and they’ve got a battle to fight.