More like The Rull

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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 Man-Kzin Wars, Fleet of Worlds, Ringworld
Alliance-UnionUniverse
universe173 books1976
Science fiction, set in far future.
“Around that spine cluster the merchanter novels of trader Families, the Faded Sun trilogy of human envoys among the martial alien Mri, and the Chanur books, narrated from the hierarchical, whiskered viewpoint of the hani.”
from the catalogue
Start with Heavy Time →
includes Chanur, Mri Wars, Hanan Rebellion, Era of Rapprochement, Company Wars, Age of Exploration, The Hinder Stars, Unionside
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, Laurie Jo Hansen, Falkenberg's Legion, War World
The Final ArchitectureSeries
series6 books2021
Space opera, adventurous in tone, about war and space exploration.
“Eighty years ago, Earth was destroyed by an alien 'Architect'.”
from the catalogue
Start with Shards of Earth →
Space BeagleSeries
series5 books1939
completed
Space opera, adventurous in tone, about space exploration, set in spaceship.
Start with Black Destroyer →
WolflingNovel
Gordon R. Dicksonstandalone novel1969
Space opera, adventurous in tone, about political intrigue and class conflict.
“Jim was just another wolfling to Afuan - a lesser being from a backward colony world.”
from the catalogue