Invasion from 2500

As Jack Eskridge sped through the night toward Chicago, the sky was suddenly lit with a flash of brilliance.

Jack stopped the car and ran toward the light. He was greeted by a fantastic sight: a huge, weirdly glowing arch, through which were pouring strange-looking tanks, airships and metallic-clad soldiers carrying sinister weapons.

Jack knew he had to get away and warn the country of the invasion. But before he could reach Chicago all the major cities in the United States had been conquered...