Super Short Summary

In Ernest Cline’s Armada, high school student Zach Lightman discovers that the video game he excels at, also called Armada, is actually a government simulation training humans to combat a real alien invasion. After witnessing a UFO identical to those in the game, Zach is recruited by the government, reunites with his presumed-dead father, and plays a key role in defending Earth. The story explores themes of family, duty, and humanity's response to potential threats.