Goddess with a blade

the long version

"Rowan Summerwaite is no ordinary woman. Physical vessel to the Celtic goddess Brigid and raised by the leader of the Vampire Nation, she's a supercharged hunter with the power to slay any vampire who violates the age-old treaty. A recent string of murders has her at odds with Las Vegas's new Scion, the arrogant and powerful Clive Stewart. The killings have the mark of Vampire all over them, and Rowan warns Clive to keep his people in line-- or she'll mete out her own brand of justice. Though her dealings with Clive are adversarial to say the least, Rowan is intensely aware of her attraction to him. But she can't let it distract her from her duty-- to find and battle the killer before more women die"--Cover, page [4].