Opus No. Titlesort ascending Date Setting Publication type I.U.C. Notes
Second Thoughts June, 1985 N/A Non-Fiction Follow-up notes by various participants in the Medea: Harlan's World world-building seminar. Other contributors include Poul Anderson, Hal Clement, Thomas M. Disch & Frederik Pohl
Seascape Tattoo, The June, 2016 Magic Universe Novel Niven and Barnes return to the universe of "The Magic Goes Away" with a brand-new tale that pits a barbarian and a sorcerer against a dangerous society of wizards who seek to rule the world with weapons stolen from the future!
109 Schumann Computer, The January, 1979 Draco Tavern Short Story D.T. 04 Draco Tavern discussion of artificial intelligence
Scatterbrain January, 2003 N/A Non-Fiction essay on the ISS
Scatterbrain January, 2003 N/A Collection Collection Info Niven's career from 1990 to 2003. Contents: Excerpt from Destiny's Road Excerpt from The Ringworld Throne Excerpt from The Burning City with Jerry Pournelle Excerpt from Saturn's Race with Steven Barnes Introduction: Where Do I Get My Crazy Ideas? Woman in Del Rey Crater, The Loki Procrustes How to Save Civilization and Make a Little Money Ice and Mirrors Ice and Mirrors Papers, The Smut Talk Telepresence Learning to Love the Space Station Autograph Ettiquette Tabletop Fusion Collaborations Intercon Trip Report: August 12, 1991 Handicap Did the Moon Move for You Too? Hugo Award Anecdotes Introduction to Man-Kzin Wars II Canon for the Man-Kzin Wars Epilogue: What I Tell Librarians Mars: Who Needs It? Introduction to Peter Hamilton story
Saturn's Race July, 2000 Saturn Novel Collaboration, co-written with Steven Barnes prequel to Achilles' Choice
Safe Harbor August, 2010 Draco Tavern Short Story Rick Schumann talks to some alien pirates who have a very good reason to want to steal a Chirpsithra liner.
20 Safe at Any Speed May, 1967 Known Space Short Story K.S. 40 (3101) The "Last" Known Space story
102 Rotating Cylinders and the Possibility of Global Causality Violation August, 1977 Time Travel/Parallel Universe Short Story Title stolen from a mathematics paper by Frank J. Tipler
125 Roentgen Standard, The July, 1980 N/A Non-Fiction Read It Here! Printed in Limits as "Yet Another Modest Proposal." Niven's published bibliographies list it as October 1981, but Carol's research indicates it appeared in July 1980
Rocket Men June, 2000 N/A Non-Fiction non-fiction for Space.com
Robert Bussard December, 2007 N/A Essay
Ringworld's Children June, 2004 Known Space: Ringworld Novel K.S. 38 (2893) 3rd Sequel to Ringworld  
Ringworld Throne, The June, 1996 Known Space: Ringworld Novel K.S. 37 (2882-93) Louis encounters more Pak Protectors 2nd sequel to Ringworld
Ringworld Retrospective April, 1989 N/A Non-Fiction Like the title says. A look back at the impact of Ringworld.
118 Ringworld Engineers, The July, 1979 Known Space: Ringworld Novel K.S. 36 (2878-81) First evidence of the Pak on the Ringworld.  First sequel to Ringworld
58 Ringworld October, 1970 Known Space: Ringworld Novel K.S. 35 (2850) Niven's best-known novel brings together Nessus & Louis Wu from previous Known Space stories Ringworld has spawned 3 sequels and a role-playing game, among other things. Though it was first printed in 1970, it appears farther down the list in Niven's published bibliographies.
Rhinemaidens January, 2005 Magic Universe Short Story A fisherman encounters the mermaids living near Castle Minterl.
Review of The Ophiuchi Hotline by John Varley May, 1978 Review
Review of Somerset Dreams and Other Fictions by Kate Wilhelm May, 1978 Review

Pages