Case Files from the Nightfall Detective Agency: Fury of the Vampire:

REALITY IS FRACTURING-AND ONLY A VAMPIRE AND A WEREWOLF STAND IN THE WAY. The enemy isn't just out for blood. Now, they want the world to burn.
They've fought the undead. Exposed the horrors behind Utopia. Risked everything to protect those who could not protect themselves.
Now, Vampire Detective Tori Jacobsen and her Werewolf partner Abraham Mueller face a threat unlike anything they've seen before: An Ancient Relic that could remake existence.
With the fabric of the world unraveling, they need every ounce of cunning-and the kind of savagery only monsters can wield.
If they fail, the future will vanish before it begins. The world will collapse into a new Dark Age ruled by monsters. Humanity won't even remember what was lost.
If they succeed... they may not survive it and lose what soul, they have left. The explosive final chapter in the Nightfall Detective Agency trilogy. If you loved the grit, heart, and horror of The Mummy's Vengeance and Trail of the Zombies, Fury of the Vampire bites even deeper. Perfect for fans of supernatural noir, gritty monster-hunters, and apocalyptic thrillers where the last line of defense wears blood and teeth.