More like The Infinite Atom

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Known SpaceUniverse
universe142 books1964
Science fiction, about aliens, set in far future and space.
“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.
“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, Falkenberg's Legion, War World, Laurie Jo Hansen
HeecheeSeries
series19 books1972
completed
Science fiction and space opera, about aliens and space exploration, set in far future and space.
“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.
“No species, the Galactics insist, ever climbs to sapience alone.”
from the catalogue
Start with Sundiver →
includes Uplift, Uplift Storm
MesklinSeries
series6 books1954
completed
Hard science fiction.
“The idea came from an object that was at the time believed to exist in the 61 Cygni system, and which might represent an extrasolar planet.”
from the catalogue
Start with Mission of Gravity →
Humanx CommonwealthUniverse
universe39 books1972
Science fiction, adventurous in tone, about aliens, set in far future and 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