Dark Reign - Danielle Rose

Vengeance is a witch.
When Ava López's new life is at stake, she wants nothing more than to be free of her mortal shackles, but just when she's ready to walk away from her upbringing, her past comes back to haunt her.
To force her hand, the newcomer takes the only things of value to Ava—her amulet and her sire. With the looming threat of world annihilation, Ava must destroy the black onyx crystal, stop a rogue vampire army, and rescue Jasik, but a confession from an ally shatters the idyllic illusion surrounding Darkhaven's magical community.
When magic is exposed, Ava must decide what's more important—protecting their secret or risking everything for the chance at a life beyond Darkhaven.