Armada

Armada is a science fiction novel by Ernest Cline, published on July 14, 2015 by Crown Publishing Group (a division of Penguin Random House). The story follows a teenager who plays an online video game about defending against an alien invasion, only to find out that the game is a simulator to prepare him and people around the world for defending against an actual alien invasion. Wil Wheaton, who narrated the audiobook version of Cline's previous novel, Ready Player One, performs the audiobook of Armada as well. The book received mixed-to-negative reviews but was a New York Times bestseller.