The Birth of Vengeance by P.A. Ross

What if you could be superhuman for a night?
Take bloody revenge on those who have wronged you, with no one knowing.

That’s the tantalizing offer Jon Harper gets from Thorn, a sultry, mysterious vampire.

An injection of the vampire formula temporarily empowers him with abilities of the dark immortals. In a fury of claws and fangs, he vanquishes his enemies and discovers a forbidden love. But as he delves deeper into the world of vampires, he makes new powerful enemies and realizes the power of the night may change him forever.

With time running out, Jon must learn Thorn’s true intentions before he faces an ultimatum: Forgiveness or Vengeance, Day or Night, Human or Vampire?