Nuclear fire brought endless night.
The darkness hides invisible terrors known as entities.

After the end of the world, Dr. Swaggart knows a demon has infected mankind's last shelter. He knows of a cure: but that means going down the mountain. In the dark. And with a damaged oxygen tank.

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Sheltered in the underground Ark 1 facility, Earth's last 300 humans fear the dark above all else... the shadows hide an ancient, primal evil--one that can take control of people, and which humans have no defense against. Deep within the miles of well lit corridors, the lights begin to flicker and fail.

Before a new darkness falls, a drug addict and a man with Downs syndrome must reclaim the light and stop a new and final demonic Armageddon... but they learn that someone inside Ark 1 had more to do with unleashing these hellish fiends than any of the survivors know.

Stay in the Light... Stay alive.

Get book 1 in this sci-fi thriller now!