More like The Starfishers Trilogy

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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
The Final ArchitectureSeries
series6 books2021
About aliens.
“Eighty years ago, Earth was destroyed by an alien 'Architect'.”
from the catalogue
Start with Shards of Earth →
Mission to UniverseNovel
Gordon R. Dicksonstandalone novel1965
Adventure, about aliens.
“Forever and a day - Brigadier General Benjamin Shore ignores a Presidential command and launches a revolutionary phase ship and its crew on an incredible journey deep into uncharted regions toward Galactic Centerpoint...”
from the catalogue
Starman JonesNovel
Robert A. Heinleinstandalone novel1953
About coming of age, set in spaceship.
“Starman Jones, a 1953 science fiction novel by Robert A. Heinlein, features a farm boy who wants to go to the stars.”
from the catalogue
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, War World, Falkenberg's Legion, Laurie Jo Hansen
Tunnel in the SkyNovel
Robert A. Heinleinstandalone novel1955
About survival and coming of age.
“As the final test of a survivalist/explorer class, teenagers are dumped on an alien planet to use their skills while awaiting pickup.”
from the catalogue