Armada : a novel / Ernest Cline. - New York : Broadway Books, 2018. - 489, 22 p. : maps ; 20 cm.
Having glimpsed a UFO that exactly resembles an enemy ship from his favorite video game, high school senior Zack Lightman becomes one of millions of gamers tasked with protecting the Earth from aliens.
High school students --Fiction.
Human-alien encounters --Fiction.