More like Against Orders

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Forbidden BordersSeries
series3 books1991
Space opera, set in other star systems.
“William Michael Gear, better known as W. Michael Gear, is an American writer and archaeologist.”
from the catalogue
Start with Requiem for the Conqueror →
HonorverseUniverse
universe83 books1993
Space opera, set in 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, Expanded Honorverse, Saganami Island, Worlds of Honor anthologies, Manticore Ascendant, Wages of Sin, Honor Harrington Universe short fiction, Star Kingdom (Honor Harrington)
Xan-Sskarn WarSeries
series1 book2010
Space opera, about aliens and revenge, set in other star systems.
“Under her petite exterior is a spine of solid steel and a disposition to laugh in the face of impending death.”
from the catalogue
Start with Ragnarok →
Old Man's WarSeries
series16 books2005
Space opera, adventurous in tone, set in other star systems.
“Sign a document at 65, saying you intend to join up 10 years later.”
from the catalogue
Start with Old Man's War →
VattaUniverse
universe10 books2003
Space opera, adventurous in tone, set in 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
Known SpaceUniverse
universe142 books1964
About aliens, set in other star systems.
“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, Fleet of Worlds, Ringworld