N-Space: Larry Niven, Tom Clancy: 9780312850890: Amazon.com: Books
Ringworld: Larry Niven: 9780722164068: Amazon.com: Books
Amazon.com: Ringworld's Children eBook : Niven, Larry: Kindle Store
Ringworld: Larry Niven, Rick Sternback: 9780345288660: Amazon.com: Books
Amazon.com: Ringworld: The Graphic Novel, Part Two: The Science Fiction Classic Adapted to Manga eBook : Niven, Larry, Mandell, Robert, Lam, Sean: Kindle Store