Known Space (Publication Order) is a 37-book series with 38 primary works first released in 1965 with contributions by Larry Niven, Dean Ing, Jerry Pournelle, S.M. Stirling, Poul Anderson, Greg Bear, Donald Kingsbury, Gregory Benford, Mark O. Martin, Hal G.P. Colebatch, Paul Chafe, Edward M. Lerner, Tom Weiner, Hal Colebatch, and Jessica Q. Fox.
#6 of 10 in Man-Kzin Wars
1994 • 1 Reader • 310 pages
#0 of 10 in Man-Kzin Wars
2002 • 1 Reader • 592 pages • 5
#4 of 10 in Man-Kzin Wars
1991 • 1 Reader • 311 pages
#7 of 10 in Man-Kzin Wars
1995 • 1 Reader • 345 pages
#5 of 5 in Fleet of Worlds
2012 • 5 Readers • 3
#1 of 5 in Fleet of Worlds
2007 • 1 Reader
#1 of 5 in Fleet of Worlds
2007 • 24 Readers • 318 pages • 3.3
#3 of 5 in Fleet of Worlds
2009 • 1 Reader • 3
#2 of 5 in Fleet of Worlds
2008 • 18 Readers • 448 pages • 3.1
#1 of 5 in Ringworld
1970 • 1 Reader • 284 pages
#4 of 5 in Ringworld
2004 • 1 Reader • 279 pages
#5 of 5 in Fleet of Worlds
2012 • 25 Readers • 316 pages • 4.2