Kiss of the Vampire (Warriors of the Rift #1)
Once a generation, the rift between the paranormal world and the human world opens, allowing supernatural entities to cross. Vampire, demon, or shapeshifter, they can save the world-or send it spiraling into chaos.
Half-demon, half-human, Nix de la Fuente is accepted by neither and mistrusted by both. Determined to prove she's more human than not, she devotes herself to solving crimes between the world's mortals and its most unsavory undead. But her latest case brings her face to face with the one vampire she could never resist . . .
Called in to investigate a string of violent murders, special agent Tobias Caine isn't interested in rekindling his relationship with Nix. Yet one look and the vampire knows his need for her is as strong as ever. Once, their all-consuming passion nearly cost Nix her fragile hold on her humanity. Now, as their hunger for one another intensifies, exposing them to an unimaginable danger, it could cost them both their lives.