The Hollow Ones (Blackwood Tapes, Volume 1)

Rookie agent Odessa Hardwicke encounters a frightening supernatural force and crosses paths with a hero unlike any other in the chilling new thriller from Guillermo del Toro and Chuck Hogan.

Odessa Hardwicke's life is derailed when she's forced to turn her gun on her partner, Walt Leppo, a decorated FBI agent who becomes suddenly, inexplicably violent while apprehending a rampaging murderer. But what most troubles Odessa isn't the tragedy itself - it's the shadowy presence she thought she saw fleeing the deceased agent's body after his death.

Questioning her future with the FBI and her sanity, Hardwicke accepts a low-level assignment to clear out the belongings of a retired agent in the New York office. What she finds there will put her on the trail of a mysterious figure named Hugo Blackwood, who is either an unhinged lunatic or humanity's best and only defense against unspeakable evil.