More like The Last Roundup

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Known SpaceUniverse
universe142 books1964
Set in other star systems.
“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
CoDominiumUniverse
universe98 books1971
Military science fiction, set in other star systems.
“The body of work runs along a few hard threads rather than one line.”
from the catalogue
Start with The Mote in God's Eye →
includes Moties, Laurie Jo Hansen, Falkenberg's Legion, War World
HeecheeSeries
series19 books1972
completed
Set in other star systems.
“The Heechee are an advanced alien race that visited the Solar System hundreds of millennia ago and then mysteriously disappeared.”
from the catalogue
Start with Gateway →
UpliftUniverse
universe13 books1980
About uplift, set in other star systems.
“No species, the Galactics insist, ever climbs to sapience alone.”
from the catalogue
Start with Sundiver →
includes Uplift, Uplift Storm
Humanx CommonwealthUniverse
universe39 books1972
Set in other star systems.
“Two species that ought, by every buried instinct, to recoil from one another instead clasp hand to truhand and build a galaxy together.”
from the catalogue
Start with For Love of Mother-Not →
includes Pip & Flinx, The Founding of the Commonwealth, Icerigger Trilogy
Heaven Chronicles / Zones of ThoughtSeries
series8 books1976
Science fiction and space opera, set in far future and space.
Start with The Outcasts of Heaven Belt →