More like The Hidden Terror

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Known SpaceUniverse
universe142 books1964
Science fiction, about aliens, set in far future and 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, Man-Kzin Wars, Fleet of Worlds
CoDominiumUniverse
universe98 books1971
Science fiction and military science fiction, set in far future and other star systems.
“The body of work runs along a few hard threads rather than one line.”
from the catalogue
Start with The Mote in God's Eye →
includes Moties, Falkenberg's Legion, Laurie Jo Hansen, War World
UpliftUniverse
universe13 books1980
About uplift.
“No species, the Galactics insist, ever climbs to sapience alone.”
from the catalogue
Start with Sundiver →
includes Uplift, Uplift Storm
The TalentsUniverse
universe18 books1959
About psychic powers.
“Somewhere a Prime holds a Tower, gathers the gestalt of a generator's power, and flings a starship — or a single frightened child — across the light-years between worlds.”
from the catalogue
Start with The Rowan →
includes Tower and the Hive, Talents (Anne McCaffrey)
Old Man's WarSeries
series16 books2005
Science fiction and space opera, adventurous in tone, about war, set in far future and space.
“Sign a document at 65, saying you intend to join up 10 years later.”
from the catalogue
Start with Old Man's War →
Starship TroopersNovel
Robert A. Heinleinstandalone novel1959
About coming of age.