Ballantine Paperbacks 1970. First edition/ First printing of Ringworld (came out in paperback first) Fine copy. Yellowing to page edges. There are two small creases down the spine, but it appears unread. First book of the Ringworld series.
About Ringworld
Ringworld is a science fiction novel by Larry Niven, known for its sophisticated treatment of hard SF concepts and the early exploration of the 'big dumb object' story device.