Parasite

From USA Today bestselling author Darcy Coates comes Parasite, a pulse-pounding sci-fi horror novel that blurs the line between survival thriller and psychological nightmare. 

Across the outer moons and space outposts of a fractured human galaxy, something unspeakable spreads. A parasite—alien, untraceable, and endlessly patient—moves from host to host, mimicking its victims with chilling accuracy. It copies their voices. Their memories. Their faces. And by the time you notice something's wrong…it's already too late.

Told through multiple interlinked storylines, Parasite follows a handful of survivors—scientists, technicians, soldiers—as they confront a threat they cannot understand, and in many cases, cannot see. What does it mean to be human? And how do you fight something that knows you better than you know yourself?

For fans of The Thing, Alien, and Into the Drowning Deep, this is an immersive and relentless story of paranoia, extinction, and the horror of not knowing who—or what—is standing beside you.