Ancestor by Scott Sigler

Deep in the snowy wilderness of northern Michigan, a team of genetic researchers is on the verge of a scientific breakthrough: creating an organism whose organs could be harvested for human transplants. But when their experiment takes a terrifying turn, the scientists realize too late that they’ve brought something monstrous to life—something powerful, intelligent, and driven by primal instincts. Cut off from the outside world and hunted by their own creation, the survivors must confront the horror of what they’ve unleashed. Ancestor is a relentless biotech thriller that fuses cutting-edge science with heart-pounding suspense, exploring the dangers of ambition when nature is forced to obey man.