Darker Things — Rob Cornell

Craig Lockman...

No one had called him that in fifteen years.

Not since his days at the Agency. Not since he was trained to kill creatures that were supposed to exist only in nightmares.

Yet the teenage girl on his doorstep not only knows his real name, she claims she's his daughter.

Before Lockman can learn how the girl found him, he's attacked by a black-ops team of assassins. But these aren't ordinary killers--they're heavily armed vampires sent by his most hated enemy.

Forced on the run, Lockman protects his daughter from an onslaught of horrors while searching for who betrayed him and why. The investigation leads him to Detroit, where he unwittingly sets a plan into motion that could trigger a paranormal apocalypse and cost him his soul.

Books of The Lockman Chronicles:
Darker Things (The Lockman Chronicles #1)
Dark Legion (The Lockman Chronicles #2)
Darkest Hour (The Lockman Chronicles #3)
Darkness Returns (The Lockman Chronicles #4)