Zack Lightman has never much cared for reality. He vastly prefers the countless science-fiction movies, books, and videogames he's spent his life consuming. And too often, he catches himself wishing that some fantastic, impossible, world-altering event could arrive to whisk him off on a grand spacefaring adventure.So when he sees the flying saucer, he's sure his years of escapism have finally tipped over into madness.Especially because the alien ship he's staring at is straight out of his favorite videogame, a flight simulator callled Armada--in which gamers just happen to be protecting Earth from alien invaders.As impossible as it seems, what Zack's seeing is all too real. And it's just the