7 Best Sci-Fi Movies Based on Books, Ranked

Science fiction has always been one of literature's most imaginative genres, as it gives authors freedom to explore everything from alien invasions and artificial intelligence to dystopian futures. Unsurprisingly, some of the best sci-fi movies of all time began as a book, with filmmakers adapting beloved novels and short stories into cinematic masterpieces. While many adaptations take huge deviations from their source material, the best sci-fi movies based on books capture the ideas, themes, and sense of wonder that made the original story so compelling.