More like Strange Encounters

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HeecheeSeries
series19 books1972
completed
Space opera, about space exploration, 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 →
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
RamaUniverse
universe7 books1973
Set in spaceship.
“Something is falling through the solar system on a hyperbolic orbit, and it is not a comet.”
from the catalogue
Start with Rendezvous with Rama →
includes Rama (2)
Cosmic Trilogy (C. S. Lewis)Series
series4 books1938
completed
About faith and religion, set in other star systems.
Start with Out of the Silent Planet →
Ender's GameUniverse
universe39 books1977
Set in far future.
“To beat your enemy you must first understand him so completely that you love him — and in the instant you love him, you destroy him.”
from the catalogue
Start with Ender's Game →
includes Ender Wiggin, First Formic War, Second Formic War, Ender's Shadow, Fleet School
The TommyknockersNovel
Stephen Kingstandalone novel1987
Dark in tone, set in north america and contemporary.