Science fiction and fantasy were two very different types of novels. Science fiction novels usually involved the future, technology, and alien creatures, while fantasy novels usually involved magic, mythology, and other topics. The difference between science fiction and fantasy lies in the background and worldview of the story. Science fiction stories usually took place in a future world dominated by science and technology or a real world similar to the future. Fantasy stories usually took place in a world dominated by supernatural forces such as magic, mythology, and other worlds. Although both science fiction and fantasy novels involve imagination and creativity, their theme and style are very different, so they can be regarded as independent novels.