Ender's Game is a science fiction novel written by Orson Scott Card. Set in a future where humanity is at war with an alien species, the story follows Ender Wiggin, a young boy who is recruited into a military training program to become a commander. Ender's exceptional skills and strategic thinking make him a key player in the war, but as he progresses through the training, he begins to question the morality of his actions. The book explores themes of war, leadership, and the consequences of one's choices.