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Science fiction books encompass imaginative narratives set in future, alternate realities, or on distant planets. These stories often explore scientific and technological concepts, societal advancements or dystopian declines, and speculative theories about the nature of time, space, life, and consciousness. Science fiction books can be consumed in both physical and audio formats, and may also intersect with other genres such as mystery, romance, horror, or nonfiction. The genre has produced numerous iconic works that have influenced popular culture and scientific progress.