Thunder of Heaven: A Joshua Jordan Novel (The End #2)
Tim LaHaye

As Biblical prophecy is fulfilled each new day, Ethan and the others in the Remnant struggle to eat, to procure necessary goods, and to avoid the Global Alliance---in short, to survive. But when the forces of evil attempt to pervert the world's most powerful information system to their own sinister ends, eliminating everyone who gets in their way, it's up to Ethan and the Remnant to subvert their dark ambitions.