Ender's Game is a science fiction novel written by Orson Scott Card. It is set in a future where humanity is at war with an alien race known as the Formics. The story follows Ender Wiggin, a young boy who is recruited by the military to train in a battle school in space. Ender quickly proves to be a tactical genius and becomes a key player in the war against the Formics. The book explores themes of leadership, morality, and the consequences of war. Ender's Game has been praised for its compelling characters and thought-provoking plot.