The legendary science fiction writer Arthur C. Clarke once said, “Any sufficiently advanced technology is indistinguishable from magic.” The lines between sci-fi and fantasy blur in some of the most popular entertainment franchises like Star Wars, Warhammer 40,000, and the Marvel Cinematic Universe, along with classic book series like Dune and Dragonriders of Pern. If you’re looking for a new world to explore and can’t decide if you want it filled with spaceships or dragons, you don’t necessarily have to choose. Just pick something from this list of the best science fantasy books of the 21st century.