Ender's Game is a 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, leadership, and the moral complexities of conflict. Ender's Game is known for its intricate world-building and compelling characters, making it a must-read for fans of alien mysteries and science fiction.