Ender's Game is a classic science fiction novel written by Orson Scott Card. It follows the story of Ender Wiggin, a young boy who is recruited by the military to train for a future alien invasion. The book delves into themes of war, morality, and the consequences of violence. Ender's Game has captivated readers with its compelling characters and thrilling plot, making it one of the best-selling alien technology science fiction books on Amazon.