More like Riverworld

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RiverworldSeries
series37 books1965
Science fiction, about faith and religion, set in far future and other star systems.
“The Riverworld is an artificial, or heavily terraformed, planet where all humans who ever lived throughout history have been resurrected.”
from the catalogue
Start with River of Eternity →
The Colors of SpaceNovel
Marion Zimmer Bradleystandalone novel1963
Space opera, about space exploration, set in space.
“The Lhari seem peaceful and friendly, but they go to some lengths to protect their monopoly on faster-than-light travel.”
from the catalogue
Known SpaceUniverse
universe142 books1964
Set in 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
HeecheeSeries
series19 books1972
completed
Space opera, about space exploration, set in space.
“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 →
DuneUniverse
universe78 books1963
Space opera, about political intrigue.
“The desert planet, where empire runs on a single substance: the spice melange, which folds space, prolongs life, and unlocks prescience, and which exists nowhere else in the known universe.”
from the catalogue
Start with Dune →
includes Dune, Dune Sequels, Heroes of Dune, Dune Prequels, Background of the Dune Universe
The AvatarNovel
Poul Andersonstandalone novel1978
Space opera, about space exploration and political intrigue, set in space.
“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