Blood Hunt by Jessica Wayne

Hunting monsters is her legacy.

Detective Rainey Astor walks a dangerous line between the human and supernatural worlds. As a vampire hunter, she’s a formidable opponent, having killed hundreds of their kind. Yet, when her latest foray into the supernatural world goes terribly wrong, she finds herself rescued by the very creature she’s vowed to kill.
Elijah Hawthorne is unlike any vampire Rainey has ever met. His sexy as hell exterior hides a tortured soul seeking redemption. Rainey knows she should avoid him at all costs, but fate has other plans. Together, they’re forced down a twisted path of ancient revenge and tainted love.
With Elijah guarding her back, Rainey must protect her heart, because giving in could mean a death sentence for them both. But if they don’t discover the hidden identity of their enemy before the clock runs out, she’s as good as dead anyway.