More like Ender's Stocking

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Starship TroopersNovel
Robert A. Heinleinstandalone novel1959
Adventurous in tone, about war, set in space and other star systems.
HonorverseUniverse
universe83 books1993
Space opera, set in other star systems and space.
“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 Star Kingdom (Honor Harrington), Honor Harrington, Saganami Island, Worlds of Honor anthologies, Manticore Ascendant, Expanded Honorverse, Wages of Sin, Honor Harrington Universe short fiction
Starman JonesNovel
Robert A. Heinleinstandalone novel1953
Space opera, adventurous in tone, about space exploration, set in space.
“Starman Jones, a 1953 science fiction novel by Robert A. Heinlein, features a farm boy who wants to go to the stars.”
from the catalogue
Space CadetNovel
Robert A. Heinleinstandalone novel1948
Adventurous in tone, about space exploration, set in space.
The ChrysalidsNovel
John Wyndhamstandalone novel1955
Reflective in tone, about genetic engineering and survival, set in secondary world.
“An early manuscript version was entitled Time for a Change.”
from the catalogue
NationNovel
Terry Pratchettstandalone novel2008
Fantasy, about survival and found family, set in islands.