The Fire Eater and Her Dragon - R. E. Vance - Bog

Trapped in a house with a ghoul, a vampire and a legion of bad guys on the front lawn ...
This'll be a night to remember.
I've finally cornered the vampire-bastard who killed my family, only to face a cold, hard truth: this monster isn't the only thing that goes bump in the night. There's something far worse out there.
A great evil - one of the original evils, actually - also has my vampire-target in its sinful sights.
Normally I would tell this new evil to get in line ... the vampire is mine to kill. But even I can't deny that if this new evil gets its way, things would get a lot worse for the world.
As in, apocalyptically so ...
To destroy it, I have to fight by the vampire's side.
But joining forces with my greatest enemy may prove too much to bear, especially when the revenge I crave so deeply is almost within my grasp.
If Mercy Thompson or Buffy ever managed to get a dragon, they'd be working with Tara Drake.