Known Space (Publication Order) is a 46-book series with 46 released primary works first released in 1965 with contributions by Larry Niven, Poul Anderson, Dean Ing, Jerry Pournelle, S.M. Stirling, 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.