The Cull Series by Eric J. Gates

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... moreBloodline 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! less

Book 2 of 'the CULL' Two new enemies emerge as the relationship between Amy and the 'new' Katie evolves in unexpected ways. Katie is searching for answers; a new ally may help in her quest. Amy finds herself taking on a powerful adversary without the help of her partner. An old nemesis returns in an unforseen twist in this thrilling continuation of 'the CULL - Bloodline'