Bete Noire (the Uruwashi Series #2)

Revenge is a fire that burns everything down. Tristan Blum may be the last Uruwashi, but neither he nor his ambiguous vampire companion, Ash, knows exactly what that means. One thing is clear though, that he's responsible for keeping the living safe from the dead. So when ancient Master vampire Yukihime comes to Tristan with news of a rogue vampire developing the dangerous gift of fire, he can't ignore it. To complicate things, the vampire they hunt is one Ash has a very intimate past with, leaving Tristan questioning her true feelings. The tempestuous couple track their target to France where they encounter faerie, kitsune, and a vampire even older than self-proclaimed "oldest of them all" Yukihime. Not all of the new contacts are willing to help or on the side of good. Just when he needs Ash the most, Tristan fears that she's pulling away. At his darkest hour, trapped in an abandoned dungeon and close to death, Tristan wonders who he can trust in his new obscure world and if the flames of a single vampire's wrath will destroy everything.