More like Cageworld

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Known SpaceUniverse
universe142 books1964
About aliens.
“Give a clever species a few centuries and a working fusion drive, and it will fill the sky with problems.”
from the catalogue
Start with Ringworld →
includes Ringworld, Fleet of Worlds, Man-Kzin Wars
PolityUniverse
universe72 books1992
Science fiction and space opera, set in far future and other star systems.
“The Quiet War is already over by the time you arrive.”
from the catalogue
Start with Shadow of the Scorpion →
includes Ian Cormac, Transformation, Rise of the Jain, Spatterjay, Time's Shadow
Old Man's WarSeries
series16 books2005
Military science fiction, about war.
“Sign a document at 65, saying you intend to join up 10 years later.”
from the catalogue
Start with Old Man's War →
NovaNovel
Samuel R. Delanystandalone novel1968
About revenge.
“The plot concerns the spaceship captain Lorq Von Ray's search for a nova, which will produce the essential power source Illyrion, and his vendetta with the Red family, who seek to kill him.”
from the catalogue
StarstreamSeries
series2 books1989
completed
Science fiction and space opera, tense in tone, set in far future and space.
“The two were published within a year of each other under the same author.”
from the catalogue
Start with From a Changeling Star →
Fifth ImperiumSeries
series3 books1991
About aliens and war.
“The three novels were later collected as the omnibus Empire from the Ashes.”
from the catalogue
Start with Mutineers' Moon →