When I read the cover, I expected a mix of normal science fiction and horror. Grass, however, is much more than that. It offers fairly detailed descriptions about the world and features many characters with different motives. Religion, politics, personal motives collide and strange metaphysical events happen. The world on Grass feels much more like an episode from the High Middle Ages, although advanced science is discussed in between. The whole is underpinned by complex family drama. Add to that the danger that is omnipresent on the planet. An exciting read that I didn't expect, even if it was a bit lengthy and complex at times.