Them  (English, Electronic book text, Applegate Katherine)

Of the Eighty people chosen to escape Earth's destruction, only a handful survived. And those that made the five-hundred-year trip through time have not emerged unscathed. They've landed among the truly bizarre, and it is now time to confront their strange new reality. Despite the enemies they know are out there, Jobs's and Mo'Steel's group venture out to explore, and soon discover what looks like a recreation of the Tower of Babel. Within the tower, they find an alien creature ? wounded, but a potential threat nonetheless. Still, they decide to follow it deeper into the tower in an effort to unlock its secrets.