Science-fiction and fantasy may appear to be very different genres at first glance. Once is full of advanced technologies, with a focus on scientific progress and how that works within the setting. Fantasy focuses on magic and oftentimes breaking the rules of the physical world in the pursuit of power. However, the two are full of more similarities than differences. Both can take place on Earth, or on another world. The world can have creatures other than humans, be they aliens or elves. Fantasy can sometimes show technology powered by magic, while highly advanced technology can sometimes appear indistinguishable from magic depending on who witnesses it. Popular franchises such as Warhammer, Isaac Asimov’s Foundation series, and even Star Wars, all find compelling ways to blend genres. Gideon the Ninth, by Tamsyn Muir, blends science-fiction and fantasy in a wonderfully gruesome way.