zlacker

Keep in mind if you start the Ringworld series there's also a tie in series that starts 200 years before Ringworld (Fleet of Worlds) and both end with the same last book. Niven and M. Learner wrote so many books...

>>winrid+(OP)
I think the Man-Kzin Wars are also somehow related, but I'm not sure if it's technically in the same continuity or not.

>>Vecr+XD
Same universe, not sure if same characters. There are like 20 books, and I think some of them are community written.