Opus No. Title Date Setting Publication typesort ascending I.U.C. Notes
Building Harlequin's Moon June, 2005 Stand Alone Novel Collaboration, co-written with Brenda Cooper
Fleet of Worlds October, 2007 Known Spac Novel Collaboration with Ed Lerner set on the Puppeteer Fleet of Worlds
Juggler of Worlds September, 2008 Known Space Novel collaboration with Ed Lerner set in Known Space and on the Puppeteer Fleet of Worlds A sequel to Fleet of Worlds
Destroyer of Worlds November, 2009 Known Space Novel Collaboration with Ed Lerner Sequel to Fleet of Worlds and Juggler of Worlds.
Betrayer of Worlds October, 2010 Known Space Novel Newest collaboration with Ed Lerner
Moon Maze Game, The August, 2011 Dream Park Novel Collaboration with Steven Barnes the newest sequel to the Dream Park novels, set on the Moon.
Fate of Worlds: Return from the Ringworld August, 2012 Known Space: Ringworld Novel "The Explosive Finale to the Ringworld and the Fleet of Worlds Series."
Bowl of Heaven October, 2012 Stand Alone Novel Collaboration with Gregory Benford, set on a macrostructure that some have called "Wok World," a giant bowl-shaped ship with a sun in the center, serving as a propulsion system. To be continued in Shipstar
Goliath Stone,The June, 2013 Stand Alone Novel Collaboration with frequent Man-Kzin Wars contributor Matthew Joseph Harrington.
Shipstar April, 2014 Stand Alone Novel Collaboration with Gregory Benford. The crew of SunSeeker continue their exploration of the giant, bowl-shaped ship bound towards their destination, the colony world called Glory. The sequel to Bowl of Heaven
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!
Starborn and Godsons April, 2020 Avalon Novel With Steven Barnes and Jerry Pournelle (who passed before it was finished). A sequel to Legacy of Heorot, The
Glorious June, 2020 Stand Alone Novel Part three of the collaboration series with Gregory Benford. 2nd sequel to Bowl of Heaven  
Moon Bowl, The (working title) January, 2020 Novel Collaboration with Jerry Pournelle & Michael Flynn.
Burning Mountain (working title) January, 2020 Magic Universe: Golden Road Novel collaboration with Jerry Pournelle, sequel to The Burning City and Burning Tower. Mentioned in the introduction to Magic Goes Away Collection, The  
3 Wrong-Way Street April, 1965 Known Space Short Stor A stand-alone time-travel story. Niven credits his editor, Fred Pohl, with a great deal of help with this story: "He published my second story, "Wrong Way Street," in Galaxy. The title is his. He felt it needed a new first chapter for coherency, and he wrote that too." Note that the story reappears in Convergent Series without the hyphen in the title.
2 World of Ptavvs March, 1965 Known Space Novella Expanded into novel form in 1966, see World of Ptavvs  
107 Magic Goes Away, The October, 1978 Magic Universe: Warlock Novella W. 04 Last Warlock story expanded from Magic Goes Away, The Later expanded into an illustrated novella. The third and final tale of the Warlock as he attempts to restore the world's depleted supply of Mana
118 Patchwork Girl, The April, 1980 Known Space: Gil Hamilton Novella Gil goes to the moon. Illustrations by Fernando. Niven's published bibliographies list the publication year as 1978, while the Ace first edition says 1980
137 Reflex January, 1983 Motie Novella Collaboration, co-written with Jerry Pournelle. This is the space battle that was excised from the beginning of Mote in God's Eye, The  

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