Kiss of Light by Lilah T. Bane

Some things are impossible for me. I don’t cry. I never feel remorse. And I can’t fall in love.

Tala is a spy and a hunter. A powerful demon, she can track anyone or anything with relentless determination and zero emotion. So it’s more than a little galling when she’s suddenly stuck acting as a bodyguard to a vampire.
Sure, Count Darian Lemar the Third is gorgeous, sensuous, and has the body of a god. But he’s a bloodsucker. And Tala hates bloodsuckers. They’re nothing but alluring psychopaths.
So what is it about this dark and dangerous vampire that makes her ache with desire?
Lemar has sworn never to return to his father’s kingdom. To do so means certain death, because of a horrific crime he committed a century ago. But the beautiful shaitun who kidnaps him has other plans.
She’s sworn to protect him from the bounty on his head whether he wants her to or not – and she won’t take no for an answer. She’s tough, stubborn, and a little bit crazy.
But there’s something about her that sets his cold undead heart on fire.