Hyperion, written by Dan Simmons, is a space war science fiction novel that blends elements of science fiction, fantasy, and horror. Set in a future where humanity is at war with a powerful alien force known as the 'Ousters,' the story follows a group of pilgrims on a journey to the mysterious Time Tombs on the planet Hyperion. Hyperion is known for its nonlinear narrative structure, compelling characters, and exploration of themes such as time, destiny, and the nature of consciousness.