Rating 5 out of 10.
Larry Niven is not that good a writer, but its anyway slightly fascinating to read about his sci-fi universe. In this book we visit the Ringworld, it's a massive artificial construction meant to support life in space. It's shaped like a massive ring around a star, this ring has got kind of the size that a planet would traverse in an orbit, so it's very big! In Niven's universe humans are just one part of the intelligent species in the universe, other species are pupeteers (a specie superior to humans in intelligence) and kzins (an animal like species, inferior to humans). The most interesting thing of the novel is that it proposes that luck is a genetic property, quite interesting.