More like Sci-Fi Ultimate Collection

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Known SpaceUniverse
universe142 books1964
About aliens, 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
A Columbus of SpaceNovel
Garrett P. Servissstandalone novel1911
About aliens, set in venus & inner planets and early 20th century.
“The year was 1909 and Garrett Putnam Serviss was already a respected science writer for the Hearst newspaper group.”
from the catalogue
Starman JonesNovel
Robert A. Heinleinstandalone novel1953
Space opera, about coming of age, set in far future.
“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
Islands in the SkyNovel
Arthur C. Clarkestandalone novel1952
About space colonization, set in near future and space station.
“Clarke wrote the story as a travelogue of human settlement of cislunar space in the last half of the twenty-first century.”
from the catalogue
Time for the StarsNovel
Robert A. Heinleinstandalone novel1956
Hard science fiction, about psychic powers and coming of age.
“Explorer spaceships need a way to communicate back to earth in a timely manner when they are light years away.”
from the catalogue
Have Space Suit - Will TravelNovel
Robert A. Heinleinstandalone novel1958
Space opera, about aliens, set in near future.
“One minute Kip Russell was walking about in his own backyard, testing out an old space suit and dreaming about going to the moon - and the next he was out cold and the captive of an insidious space pirate.”
from the catalogue