Aliens: More Than Human - John Arcudi

A group of wildcat planetary prospectors plant their flag on a distant new world, rich in land, resources . . .and the greatest archaeological discovery in history, an ancient complex of impossible proportions carved deep within the living rock, a mind-numbing labyrinth of passages, ramps, bridges, and galleries that seems to extend limitlessly. But as the exploration of the leviathan dead city proceeds deeper and deeper, the members of the team slowly begin to lose their grip on reality, and madness gives way to fear as the explorers begin to disappear.