Opus No. Title Date Settingsort ascending Publication type I.U.C. Notes
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!
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  
Canon for the Man-Kzin Wars January, 2003 Known Space: About Non-Fiction Like the title says
Preface to Ringworld's Children August, 2004 Known Space: About Non-Fiction further discussion of Ringworld's literary and physical parameters
1 Coldest Place, The December, 1964 Known Space Short Story K.S. 01 (1985) Niven's first published story saw print right around the same time that scientists determined with radar pulses that Mercury doesn't keep one face to the sun after all
2 World of Ptavvs March, 1965 Known Space Novella Expanded into novel form in 1966, see World of Ptavvs  
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.
5 Becalmed in Hell July, 1965 Known Space Short Story K.S. 02 (1985) sequel to Coldest Place, The
6 Warriors, The February, 1966 Known Space Short Story K.S. 18 (2360) 1st Man-Kzin War story
7 Eye of an Octopus February, 1966 Known Space Short Story K.S. 04 (1996) Discovery of Martians
10 World of Ptavvs June, 1966 Known Space Novel K.S. 07 (2106) This was Larry's first published full length novel.  A shorter version of this story appeared in Worlds of Tomorrow, March 1965 (#3).
11 How the Heroes Die October, 1966 Known Space Short Story K.S. 05 (2040) Murder on Mars, and Martians
12 Neutron Star October, 1966 Known Space Short Story K.S. 22 (2644) First Beowulf Shaeffer story and the first story set in the hyperdrive era of Known Space.
13 At the Core November, 1966 Known Space Short Story K.S. 24 (2646) Beowulf discovers the core of the galaxy is exploding. First appearance of Long Sho
14 At the Bottom of a Hole November, 1966 Known Space Short Story K.S. 08 (2112) Martians
15 Relic of the Empire, A December, 1966 Known Space Short Story K.S. 23 (2645) First story that ties the world of Luke Garner to the world of Beowulf Shaeffer.  
16 Soft Weapon, The February, 1967 Known Space Short Story K.S. 31 (2658) Introduction of Nessus.  Later made into "The Slaver Weapon," an animated Star Trek script, with Spock in Nessus' role. See: Slaver Weapon, The
18 Flatlander March, 1967 Known Space Short Story K.S. 25 (2646) First appearance of Outsiders
20 Safe at Any Speed May, 1967 Known Space Short Story K.S. 40 (3101) The "Last" Known Space story
21 Adults, The May, 1967 Known Space Short Story K.S. 12 (2125) Protector part 1

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