Fangs of Fate - Untish Series, #1

Tate Aaralyn is both prey and predator-a duality that defines her. Beyond the veil that separates worlds, lies the Glenn: the home of vampires. There, she is prey-fragile and weak, her flaws laid bare. She is a vampire who struggles with the ethics of feeding. And yet, in the human realm she is the executioner of justice. But when Tate is sent to a disciplinary hearing that results in forced enlistment to the gaura, her worst nightmare is made real.
In desperation to make a lasting difference, Tate faces her biggest challenge yet-Aether, a vampire unlike any other. As lines blur, she must navigate the labyrinth of lies and embrace her newfound power, all while questioning her mysterious bond to the male who has managed to capture her heart and, somehow, earn her trust. Chance Dale may be the president's son, but even with his birthright he is, by all accounts, a disappointment.
After witnessing evil evolving and the violation of life as he knows it, Chance must find a way to defeat the dark magic before it spreads. The world of politics becomes nuanced, and he is forced to question the very statutes that have guided his life or watch everything he's worked for burn. Chance's quest to secure the Glenn from foreign powers has his path crossing with Tate's-his former lover and deepest regret.
As the truth unravels, he must choose between the love he once had or the one he could have. Worse yet, that very love could soon become the enemy he hunts.