More like Collision Course

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Starship TroopersNovel
Robert A. Heinleinstandalone novel1959
Adventurous in tone, about coming of age, set in space and other star systems.
JanissariesSeries
series4 books1979
Adventurous in tone, about political intrigue and slavery, set in other star systems.
“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 →
Known SpaceUniverse
universe142 books1964
Set in space and 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, Ringworld, Fleet of Worlds
ArmorNovel
John Steakleystandalone novel1984
Dark in tone, about madness, set in other star systems.
ConquerorsSeries
series3 books1994
First contact, adventurous in tone, set in other star systems and space.
“Zahn alternates perspective between the human and alien chains of command, using the shifting viewpoints to slowly unpick why the conflict started in the first place.”
from the catalogue
Start with Conquerors' Pride →
Old Man's WarSeries
series16 books2005
Adventurous in tone, set in space and 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 →