More like Tesseracts 8

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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
The City and the StarsNovel
Arthur C. Clarkestandalone novel1956
About immortality.
HainishSeries
series33 books1964
completed
Science fiction, reflective in tone, set in far future and other star systems.
“The Hainish Cycle consists of a number of science fiction novels and stories by Ursula K. Le Guin.”
from the catalogue
Start with Rocannon's World →
A Meeting with MedusaSeries
series2 books1971
Hard science fiction, about immortality, set in outer planets & moons.
“Arthur C. Clarke's A Meeting with Medusa follows an astronaut, badly injured in an earlier disaster, on a solo balloon expedition into Jupiter's atmosphere, where he encounters vast floating lifeforms unlike anything previously catalogued.”
from the catalogue
Start with A Meeting with Medusa →
ThistledownSeries
series5 books1978
completed
Hard science fiction.
Start with The Wind from a Burning Woman →
AuroraNovel
Kim Stanley Robinsonstandalone novel2015
Hard science fiction, about artificial intelligence and space colonization, set in spaceship.