Opus No. Title Date Setting Publication typesort ascending I.U.C. Notes
Introduction to Man-Kzin Wars II August, 1989 N/A Introduction Like the title says
Introduction to Man-Kzin Wars IV January, 1991 N/A Introduction Like the title says
Introduction to Bridging the Galaxies November, 1993 N/A Introduction Introduction
Foreword to The Guide to Larry Niven's Ringworld February, 1994 Known Space: About Introduction A brief discussion of the Ringworld and how it's been re-engineered by fans, both professional and amateur, over the years.
Foreword to Wolff & Byrd, Counselors of the Macabre: Fright Court January, 1995 N/A Introduction Following the 2002 San Diego Comic-Con, Niven wrote "I met Batton Lash at last. He's Wolff and Byrd, Attorneys for the Macabre. I wrote an introduction for his second coffee-table book." Turns out the book in question was published in 1995!—Ed.
Afterword: Science/Mystery Fiction June, 1995 N/A Introduction Niven discusses the combination of two genres: mystery and Sci-fi.
My Universe and Welcome Back! November, 1996 Known Space: About Introduction New introduction for the new Known Space collection. The title is a direct reference to My Universe and Welcome To It!
Reference Director Speaks, The March, 1999 Svetz Introduction Notes on the various Martian references contained in Rainbow Mars, along with a helpful timeline
Getting Your Dime's Worth September, 1999 DC Universe Introduction Introduction to DC Pulp Fiction Library's Mystery in Space by Gardner Fox, Alex Toth, et. al.
Introduction to Peter Hamilton story January, 2003 N/A Introduction a discussion of sci-fi-mystery
Introduction: Where Do I Get My Crazy Ideas? January, 2003 N/A Introduction Introduction to Scatterbrain
Introduction to The Rackham Files by Dean Ing February, 2004 N/A Introduction Like the title says
Introduction February, 2005 N/A Introduction Introduction to Magic Goes Away Collection, The
Introduction January, 2006 N/A Introduction A new introduction to the Draco Tavern and its exotic inhabitants, written for the new collection Draco Tavern, The  
Pastel Terror, The August, 1971 Star Trek Script Read It Here! Outline for a Star Trek plot, never offered to the show.  The script also appeared in APA-L.
Slaver Weapon, The December, 1973 Star Trek Script Airdate Dec. 15, 1973. This script (and the book adaptation that followed) sparked the ongoing debate about the existence of Kzinti in the Star Trek universe. Based on Soft Weapon, The
Land of the Lost: "Downstream" September, 1974 Land of the Lost Script Collaboration, co-written with David Gerrold, airdate September 28, 1974
Land of the Lost: "Hurricane" December, 1974 Land of the Lost Script Collaboration, co-written with David Gerrold, airdate December 21, 1974
Land of the Lost: "Circle" December, 1974 Land of the Lost Script Collaboration, co-written with David Gerrold, airdate December 28, 1974.
Léshy Circuit, The November, 1993 Léshy Script Unfinished Script for Planetarium Show. As the title suggests, this is a script for a show that would take viewers on a high-speed chase through the galaxy. It includes the "right-angle turn" at a neutron star that was eventually written into Protector

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