More like The Spin Trilogy

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Known SpaceUniverse
universe142 books1964
About aliens, 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
Starman JonesNovel
Robert A. Heinleinstandalone novel1953
About coming of age, set in spaceship and other star systems.
“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
CommonwealthUniverse
universe12 books2002
Science fiction and space opera, set in far future.
“Step aboard the train at the Second Chance terminal and ride the wormhole to another star.”
from the catalogue
Start with The Dreaming Void →
includes Void Trilogy, Commonwealth Saga, Chronicle of the Fallers
The Colors of SpaceNovel
Marion Zimmer Bradleystandalone novel1963
Mysterious in tone, about aliens, set in other star systems.
“The Lhari seem peaceful and friendly, but they go to some lengths to protect their monopoly on faster-than-light travel.”
from the catalogue
Fifth ImperiumSeries
series3 books1991
Tense in tone, about aliens and war.
“The three novels were later collected as the omnibus Empire from the Ashes.”
from the catalogue
Start with Mutineers' Moon →
HeecheeSeries
series19 books1972
completed
About aliens, 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 →