Libainimesed , Härjapõlvlaste kaitseala

Two novels by the famous science-fiction author Clifford D. Simak. "Libainimesed" is about an extraterrestrial organisms which mutate into humans and start buying up land on Earth, which leaves no room for humanity. "Härjapõlvlaste kaitseala" is a warning sign for remembering and protecting our past, because a time will come, when our time will also be forgotten.