Leave the World Behind description:

Bearing grim news of an unknown enemy and the shocking certainty that the city succumbs to chaos, a sharp-dressed stranger and his young companion disrupt Amanda's and Clay's much-needed family vacation. But the information the unwanted couple brings is inconceivable. Now, a complex, multilevel mystery unfolds before everyone's eyes, whether they like it or not. After all, the unsuspecting tourists have already encountered a series of mysterious, logic-defying incidents during their brief stay. As a result, vague disbelief and a palpable sense of threat ratchet up the tension, rendering modern technology unreliable. And the question remains: in a rapidly disintegrating world where nothing makes sense, what can you do to protect your own and what used to be your cherished ordinary life?