Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The biggest novel by Mr. Big.

I always called Larry Niven Mr. Bog, because he had some big ideas in hisnovels, like moving the planet Uranus in order to move the Earth before thesun turns into a red giant. But no idea was bigger than Ringworld, a ringbuilt around a star with 3 million times the surface area of the Earth.Just the idea is enough to send the mind spinning. And when a Puppeteersends Louis Wu and Kizinti Speaker To Animals to the Ringworld to discoverwho built it, the adventure is on. Probably Niven's best known work, hewon one of his several Hugos for this masterwork. This is essentialscience fiction reading from a master of hard science fiction. Don't wantto give too much away, but Ringworld brings together a lot of loose endsfrom Niven's Tales of Known Space.