Fans of science fiction novels and fantasy books know they have some pretty insane covers. Fortunately for fans, Geek.com took the time compile a list of their favorite, insane sci-fi and fantasy book covers. The first book on their list is 'Alien Art" by Gordon R. Dickson. They wrote that the cover has a " landscape, a city that looks like glowing mushrooms, a [man] with a gun and some kind of giant god-mongoose." Another book on their list is, "Harm's Way' by Colin Greenland. One version of the book shows two scantily clad angels embracing each other.