Doom #2: Hell on Earth Book

They were creatures seemingly spawned straight from the pits of Hell — demons, zombies, fire-breathing imps — all too horrifically close to the stuff of nightmare to be real. But they were. And on the inhospitable moons of Mars, Corporal Flynn "Fly" Taggart, Earth's last line of defence against a seemingly inexhaustible supply of alien warriors, beat them back almost single-handedly.

But Taggart discovers that the war had barely begun...for while he was fighting them on Mars, the hellish creatures had established a beachhead on Earth itself. Now, with the aid of a fourteen-year-old female computer genius, an unrepentantly Mormon sniper, and the best soldier in this woman's army, Fly Taggart must defeat the invaders — and their treacherous human allies — yet again...

You were tossed into the abyss of galactic purgatory and you survived--the only one. The sole remnant of a massive exploration team that was destroyed by the deformed monstrosities from Outside. Now, it's over and you're home. But something is wrong. You can feel it. It's starting all over again--and now it's on Earth. Original.