More like Thaddeus Marcell Chronicles

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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, War World, Laurie Jo Hansen
JanissariesSeries
series4 books1979
About political intrigue.
“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 →
VattaUniverse
universe10 books2003
Science fiction and space opera, tense and adventurous in tone, set in far future and other star systems.
“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
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, Wages of Sin, Worlds of Honor anthologies, Expanded Honorverse, Manticore Ascendant, Honor Harrington Universe short fiction, Star Kingdom (Honor Harrington)
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
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)