A Mask of Flies by Matthew Lyons is a crime horror novel which blends It Follows and The Outsider, with a pinch of The Evil Dead, in which a criminal and the cop she's taken hostage must find their way to safety - pursued by threats both human and supernatural - after a failed bank robbery.

In the bloody aftermath of a botched bank heist, career criminal Anne Heller has no choice but to return to her family's cabin - a secluded shack in the San Luis Valley, and the site of her mother's untimely death.

Along for the ride are Jessup, Anne's partner, and Dutch, the police officer she's taken hostage. As they wait for help, Anne discovers strange relics of her mother and begins to unfold the mystery of her childhood at the cabin.

Anne's quest to uncover more is interrupted when Jessup goes missing, only to turn up dead. She and Dutch bury her friend, but that night, the dead man comes back, seemingly risen from his grave to knock at the cabin door. Not a dream, not a hallucination, but not exactly Jessup, either. Something else. Something wearing her friend's face. Something hungry...

The cops aren't the only ones after Anne, and unraveling the secrets of her mother's past may be her only hope of getting out alive.

A Mask of Flies is a gritty, heartfelt meditation on death, family, and the ever-changing, monstrous nature of grief.