Opus No. Title Date Setting Publication typesort descending I.U.C. Notes
Thraxisp: A Memoir October, 1991 The Ghetto Non-Fiction Essay on Joel Hagen's world-building project
183 Lost Ideas, The October, 1991 N/A Non-Fiction Like the title says
184 Ghetto? But I Thought... October, 1991 The Ghetto Non-Fiction Essay on the "Science Fiction Ghetto." Includes the text of "Convention Stories" from Niven's Laws
185 Adrienne and Irish Coffee October, 1991 The Ghetto Non-Fiction Like the title says
187 Trantorcon Report October, 1991 The Ghetto Non-Fiction Guide to the ultimate Sci-fi convention in 23,309. A version of this appeared in APA-L #500, Dec. 11, 1974, and later reprinted in a fanzine by Marty Cantor called No Award, with cartoons by William Rotsler and others.
188 Comics October, 1991 N/A Non-Fiction Essay on Niven's relationship with comics and the comics industry
189 From the Green Lantern Bible October, 1991 N/A Non-Fiction Excerpts from the Green Lantern "Bible" Niven worked up for DC Comics. Some of the results of this effort can be seen in Green Lantern: Ganthet's Tale
Works in Progress October, 1991 N/A Non-Fiction Discussion of works in progress as of the publication of Playgrounds of the Mind  
Where Next, Columbus? January, 1992 N/A Non-Fiction Collaboration, co-written with Jerry Pournelle
Regulating the Body Business March, 1996 N/A Non-Fiction Discussion of organlegging, a sci-fi crime gone real-world.
Catfish and Red Meat Flavoring October, 1996 Non-Fiction more recipes
Timeline for Known Space November, 1996 Known Space: About Non-Fiction Updated from the version that originally appeared in Tales of Known Space
Afterthoughts November, 1996 N/A Non-Fiction Like the title says: Afterthoughts on the growth of Known Space, looking back 30 years later.
Bibliography: The Worlds of Larry Niven November, 1996 Known Space: About Non-Fiction Annotated by "universe," lists latest publication only. Updated from the version in Tales of Known Space  
Mission to Abisko November, 1998 N/A Non-Fiction Report on a trip to an exclusive conference at Abisko Biological Research Station in Sweden, with fellow travellers Greg Bear and Gregory Benford.
Svetz and the Beanstalk March, 1999 N/A Non-Fiction Niven reveals how Rainbow Mars came to be written, with shout-outs to Neil Gaiman, Terry Pratchett, Carl Sagan, Kip Thorne, Frank Tipler, Jerry Pournelle, Robert Heinlein, and Suzanne Gibson and Warren James of Hour 25.
Mars: Who Needs It? March, 2000 N/A Non-Fiction non-fiction for Space.com
How to Save Civilization and Make a Little Money April, 2000 N/A Non-Fiction Non-fiction for Space.com, has almost nothing to do with the report presented by the Citizens Advisory Council for a National Space Policy.  
Travelers May, 2000 N/A Non-Fiction non-fiction for Space.com
Rocket Men June, 2000 N/A Non-Fiction non-fiction for Space.com

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