More like Uncommon Valor

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Known SpaceUniverse
universe142 books1964
About aliens.
“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 Man-Kzin Wars, Ringworld, Fleet of Worlds
Starship TroopersNovel
Robert A. Heinleinstandalone novel1959
About coming of age and aliens.
Old Man's WarSeries
series16 books2005
Space opera.
“Sign a document at 65, saying you intend to join up 10 years later.”
from the catalogue
Start with Old Man's War →
HonorverseUniverse
universe83 books1993
Space opera.
“At the center stands one officer, Honor Harrington — captain, then something far larger — and the six-limbed empathic treecat who rides her shoulder.”
from the catalogue
Start with On Basilisk Station →
includes Honor Harrington, Saganami Island, Worlds of Honor anthologies, Wages of Sin, Expanded Honorverse, Manticore Ascendant, Star Kingdom (Honor Harrington), Honor Harrington Universe short fiction
JanissariesSeries
series4 books1979
About political intrigue and slavery.
“Janissaries are an American series of military and political-based science fiction novels are set in an interstellar confederation of races, in which humans are a slave race entrusted with military affairs and law enforcement.”
from the catalogue
Start with Janissaries →
PolityUniverse
universe72 books1992
Space opera.
“The Quiet War is already over by the time you arrive.”
from the catalogue
Start with Shadow of the Scorpion →
includes Ian Cormac, Transformation, Time's Shadow, Spatterjay, Rise of the Jain