More like The Amphibians

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NovaNovel
Samuel R. Delanystandalone novel1968
Space opera, about revenge, set in space and other star systems.
“The plot concerns the spaceship captain Lorq Von Ray's search for a nova, which will produce the essential power source Illyrion, and his vendetta with the Red family, who seek to kill him.”
from the catalogue
Endless BlueNovel
Wen Spencerstandalone novel2007
Space opera, about aliens and survival, set in space.
“The appearance of the warp drive from a long lost spaceship, the Fenrir, triggers an epic quest fort he rest oft the ship, a mission led by Captain Mikhail Volkov.”
from the catalogue
Starman JonesNovel
Robert A. Heinleinstandalone novel1953
Space opera, about coming of age, set in space.
“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
Known SpaceUniverse
universe142 books1964
About aliens, set in space 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
DumarestSeries
series35 books1967
completed
Space opera, set in space and other star systems.
Start with The Winds of Gath →
Humanx CommonwealthUniverse
universe39 books1972
About aliens, set in other star systems and space.
“Two species that ought, by every buried instinct, to recoil from one another instead clasp hand to truhand and build a galaxy together.”
from the catalogue
Start with For Love of Mother-Not →
includes Pip & Flinx, Icerigger Trilogy, The Founding of the Commonwealth