More like Valkyrie Burning

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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 Man-Kzin Wars, Ringworld, Fleet of Worlds
Old Man's WarSeries
series16 books2005
Military 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 →
CoDominiumUniverse
universe98 books1971
Military science fiction and 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, War World, Laurie Jo Hansen
Forever WarSeries
series10 books1972
Military science fiction and science fiction, set in far future and space.
Start with Hero →
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 →
Starship TroopersNovel
Robert A. Heinleinstandalone novel1959
About coming of age.