More like The Voidwalker Chronicles

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Fifth ImperiumSeries
series3 books1991
Tense in tone.
“The three novels were later collected as the omnibus Empire from the Ashes.”
from the catalogue
Start with Mutineers' Moon →
Starship TroopersNovel
Robert A. Heinleinstandalone novel1959
About coming of age, set in other star systems.
Old Man's WarSeries
series16 books2005
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 →
The Saga of Seven Suns UniverseSeries
series16 books2002
Tense in tone.
Start with Hidden Empire →
The Final ArchitectureSeries
series6 books2021
Tense in tone, about space exploration, set in other star systems.
“Eighty years ago, Earth was destroyed by an alien 'Architect'.”
from the catalogue
Start with Shards of Earth →
VattaUniverse
universe10 books2003
Tense 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