More like The Outer Reaches

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The Colors of SpaceNovel
Marion Zimmer Bradleystandalone novel1963
Space opera, adventurous in tone, set in other star systems and far future.
“The Lhari seem peaceful and friendly, but they go to some lengths to protect their monopoly on faster-than-light travel.”
from the catalogue
HeecheeSeries
series19 books1972
completed
Space opera, set in far future and 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 →
The AvatarNovel
Poul Andersonstandalone novel1978
Space opera, about political intrigue, set in far future and other star systems.
“With the aid of the political opposition, they escape and journey through the portal in search of knowledge, and perhaps even to meet those who created the portal system.”
from the catalogue
Known SpaceUniverse
universe142 books1964
Set in far future and 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
Minervan Experiment / GiantsSeries
series5 books1977
completed
Hard science fiction, set in far future.
“The Giants series is a quintet of science fiction novels by James P. Hogan, published between 1977 and 2005.”
from the catalogue
Start with Inherit the Stars →
Academy / Priscilla (Hutch) HutchinsSeries
series16 books1983
Set in far future and other star systems.
“Beginning with The Engines of God, the series treats deep time and the near-total absence of intelligent alien life as its central mystery, favoring slow-burn discovery over action.”
from the catalogue
Start with The Engines of God →