The Hyde Within

He became the hunter to stop the monster who killed his parents.
He never realized the monster was already inside him.
When twelve-year-old Miles Jordan came home to find his parents murdered, the killer left a message written in their blood: Let's play, Miles. The boy felt nothing. That silence never left him.
Sixteen years later, Miles is one of the FBI's most relentless profilers-brilliant, controlled, and haunted by the only case he could never close. When a new double homicide appears with the exact same signature, the trail leads to a suspect from his hometown... and then to something far worse.
A new killer is moving through the system, always one step ahead of the Bureau. He signs his work with a single word: APEX. He only kills the ones the law is about to catch. And he seems to know every move the FBI makes before they make it.
As the body count rises and suspicion turns inward, Miles and his wife-fellow agent Sarah McAllister-begin to doubt each other, their marriage, and the very ground they stand on. The closer Miles gets to the truth, the more the silence inside him starts to speak.
Some monsters are born.
Some are made.
And some have been waiting patiently in the dark the entire time.