the CULL - Bloodline (the CULL Series, book 1) (Cull Series, 1) / Eric J. Gates

the CULL - Bloodline is a fast-paced and highly original take on vampire lore -- no fangs, no morphing into bats, just adrenaline-pumping fury as two female federal agents encounter the unimaginable.

Amy Bree's reckless actions result in death and her dismissal from the FBI. But a visit from a mysterious priest propels her back into the fray. Partnered with an ex-spy with fearsome computer skills, she is tasked to hunt down and kill the serial killer known as the Blood Sucker. Their quarry, however, is not what they expect. The body count rises, and soon the hunters become the hunted!