More like The Isis Trilogy

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Starman JonesNovel
Robert A. Heinleinstandalone novel1953
About space exploration, set in space and spaceship.
“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
Citizen of the GalaxyNovel
Robert A. Heinleinstandalone novel1957
About identity and slavery, set in space.
“On a planet far distant from Earth, a lame beggar buys a young boy slave who has forgotten his origins.”
from the catalogue
Starship TroopersNovel
Robert A. Heinleinstandalone novel1959
Military science fiction, about war, set in space.
Red PlanetNovel
Robert A. Heinleinstandalone novel1949
Set in mars.
“A boy colonist on Mars takes his bouncing ball Martian pet with him to boarding school, but the new Headmaster is a controlling tyrant.”
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
The Colors of SpaceNovel
Marion Zimmer Bradleystandalone novel1963
Mysterious in tone, 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