Binary Cycle: Part 1: Disruption (Binary Cycle Saga 1)

They escaped a ruined Earth, barely staving off extinction. Two-hundred years after arriving on the beautiful and bizarre planet of Taran, humanity is thriving once again. Until now...When famous scientist Cassidy Walker uncovers evidence that the planet is teetering on the brink of disaster - a catastrophe that mankind will not walk away from - the countdown to the next great challenge in human history begins. And they might not survive this time.