The Facility - Jack Lee - Bog

What began as a routine night for the security guards at the Pine Mountain National Security Complex quickly becomes just the opposite. When a calibration error on some instrumentation leads to an "accidental" release something long hidden and kept secret, the staff soon find their selves in a fight for their lives. It's a life and death struggle against un-earthly forces bent on procreation to preserve their species and one where only the luckiest and those with the will to survive will have a chance to get out alive.