Ringworld - Wikipedia

https://en.wikipedia.org/wiki/Ringworld

Just finished the audiobook for this on YouTube.  Great book.    https://youtu.be/4DMkDqIjEuI

I read the novel around 30 years ago. The YouTube version of this is a little uneven on quality.  I suspect that it was copied from audio tape. 

I already have listened to the next two books on Audible.  I may listen to them again.  I started with the 4 prequels on Audible and I'm slowly  working my way through the entire series. 

Multiple authors have contributed to the "Known Space" universe that Larry Niven created.  There may be as many as 40 books. 

Best wishes,

John Coffey