More like Nebula Awards 33

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Stranger in a Strange LandNovel
Robert A. Heinleinstandalone novel1961
First contact, about psychic powers, set in north america and near future.
The World at the End of TimeNovel
Frederik Pohlstandalone novel1990
Hard science fiction, about space colonization and immortality, set in deep space.
Imperial EarthNovel
Arthur C. Clarkestandalone novel1975
About cloning and space exploration, set in outer planets & moons.
“The plot follows the protagonist, Duncan Makenzie, on a trip to Earth from his home on Titan, in large part as a diplomatic visit to the U.S. for its quincentennial in 2276, but also to have a clone of himself produced.”
from the catalogue
Saint LeibowitzSeries
series6 books1955
completed
Post-apocalyptic, set in north america.
“Together the two novels form a sparse, decades-spanning series about memory, faith, and the cycles of civilization.”
from the catalogue
Start with A Canticle for Leibowitz →
Memoirs of a SpacewomanNovel
Naomi Mitchisonstandalone novel1962
About space exploration, set in other star systems.
The Sirens of TitanNovel
Kurt Vonnegut & Jr.standalone novel1959
Space opera, funny in tone, set in mars.