More like Valentine's War

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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
Old Man's WarSeries
series16 books2005
Science fiction and military science fiction, 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 →
HonorverseUniverse
universe83 books1993
Science fiction and space opera, set in far future and other star systems.
“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, Honor Harrington Universe short fiction, Star Kingdom (Honor Harrington)
VattaUniverse
universe10 books2003
Science fiction and space opera, adventurous and tense in tone, set in far future and space.
“Get kicked out of the Academy and the family still hands you a ship.”
from the catalogue
Start with Trading in Danger →
includes Vatta's War, Vatta's Peace
JanissariesSeries
series4 books1979
About 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 →
FoundationUniverse
universe123 books1940
About robots.
“There is a science that reads the future of quadrillions the way an astronomer reads the orbits of stars.”
from the catalogue
Start with Foundation →
includes Trantorian Empire, Foundation, The Collected Fiction of Isaac Asimov, Second Foundation Trilogy, The Positronic Robot Stories, Foundation (Original Stories)