Halcyone Space
by L.J. Cohen
3.83 · 18 ratings
sci-fi · space-opera · galactic-empire · space · lgbtq · colonization · young-adult · action-adventure · fiction · exploration · space-travel · book · comics · ai · audiobook · alpha-mc · female-mc
Halcyone Space: Similar series
Legacy Fleet Trilogy
by Nick Webb
4.10 · 89 ratings
action-adventure · supernatural · soldiers · sci-fi · galactic-empire · space-opera · first-contact · space-travel · military · audiobook · adult · space-fleet · space · violent-conflict · invasion · war · book · technothriller · colonization · exploration
All books in this series ❯
The Atlantis Grail
by Vera Nazarian
4.33 · 99 ratings
space-travel · sci-fi · futuristic · fiction · aliens · exploration · dystopia · audiobook · book · post-apocalyptic · romance · young-adult · action-adventure · female-mc · galactic-empire · royalty · colonization · space-opera · military · apocalyptic
All books in this series ❯
Undying Mercenaries
by B.V. Larson
4.28 · 383 ratings
war · aliens · soldiers · fiction · sci-fi · space-opera · military · violent-conflict · space-fleet · adult · invasion · book · colonization · galactic-empire · audiobook · space · first-contact · space-travel · hard-sci-fi · exploration
All books in this series ❯
Ascension Wars
by Jasper T. Scott
3.86 · 58 ratings
industrial-era · genetic-engineering · space · galactic-empire · colonization · supernatural · invasion · post-apocalyptic · book · military · first-contact · violent-conflict · historical · adult · space-fleet · soldiers · sci-fi · space-travel · exploration · fiction
All books in this series ❯
Blood on the Stars
by Jay Allan
4.33 · 243 ratings
fiction · aliens · exploration · first-contact · military · space-fleet · adult · violent-conflict · soldiers · sci-fi · space-travel · space-opera · invasion · book · space · galactic-empire · colonization · war · audiobook · action-adventure
All books in this series ❯
Drop Trooper
by Rick Partlow
4.38 · 152 ratings
military · space-fleet · adult · violent-conflict · soldiers · galactic-empire · colonization · aliens · fiction · invasion · book · space · sci-fi · space-travel · action-adventure · exploration · first-contact · space-opera · war · audiobook
All books in this series ❯
Delphi in Space
by Bob Blanton
4.38 · 134 ratings
fiction · military · first-contact · violent-conflict · space-fleet · book · young-adult · action-adventure · aliens · exploration · sci-fi · space-travel · audiobook · space · invasion · space-opera · colonization · ai · coming-of-age · litrpg
All books in this series ❯
Aeon 14: The Intrepid Saga
by M.D. Cooper
4.18 · 67 ratings
cyberpunk · space · colonization · space-opera · soldiers · sci-fi · adult · violent-conflict · military · hard-sci-fi · fiction · galactic-empire · space-travel · space-fleet · exploration · action-adventure · female-mc · alpha-mc · audiobook · book
All books in this series ❯
Aurora Rising
by G.S. Jennsen
4.13 · 66 ratings
sci-fi · space-travel · space-opera · first-contact · military · fiction · action-adventure · galactic-empire · cyberpunk · colonization · space-fleet · violent-conflict · aliens · exploration · ai · space · romance · book · soldiers · adult
All books in this series ❯
Lost Starship
by Vaughn Heppner
4.24 · 155 ratings
military · space-fleet · adult · genetic-engineering · violent-conflict · soldiers · galactic-empire · space-opera · colonization · aliens · fiction · action-adventure · invasion · book · space · sci-fi · audiobook · space-travel · exploration · ai
All books in this series ❯
The Terra Nova Chronicles
by Richard Fox
4.19 · 41 ratings
action-adventure · sci-fi · galactic-empire · space-opera · space-travel · first-contact · space · violent-conflict · invasion · book · colonization · aliens · exploration · fiction · military · young-adult · audiobook · adult
All books in this series ❯
Space Troopers
by Jamie McFarlane
4.41 · 29 ratings
space-travel · space-opera · soldiers · sci-fi · violent-conflict · space · space-fleet · adult · military · book · exploration · fiction · galactic-empire · audiobook · action-adventure · colonization · technothriller · invasion · aliens
All books in this series ❯
The Orion War
by M.D. Cooper
4.40 · 124 ratings
fiction · space-opera · sci-fi · adult · cyberpunk · hard-sci-fi · space · audiobook · book · violent-conflict · space-fleet · military · lgbtq · galactic-empire · soldiers · colonization · space-travel · exploration · supernatural · action-adventure
All books in this series ❯
Earth Girl
by Janet Edwards
4.18 · 73 ratings
fiction · futuristic · sci-fi · young-adult · space · book · dystopia · action-adventure · military · galactic-empire · friendship · exploration · space-opera · female-author · colonization · children-books · aliens · apocalyptic · violent-conflict · space-travel
All books in this series ❯
Wholesale Slaughter
by Rick Partlow
4.41 · 56 ratings
adult · space · space-fleet · violent-conflict · military · galactic-empire · space-travel · soldiers · exploration · fiction · action-adventure · sci-fi · colonization · book · audiobook · space-opera · supernatural · war · invasion · genetic-engineering
All books in this series ❯
Valerie’s Elites
by Justin Sloan
4.51 · 31 ratings
action-adventure · soldiers · sci-fi · galactic-empire · space-travel · first-contact · military · audiobook · space-fleet · space · genetic-engineering · violent-conflict · invasion · book · colonization · aliens · exploration · fiction · young-adult · shapeshifters
All books in this series ❯
Rise of the Empire
by Ivan Kal
4.37 · 91 ratings
aliens · fiction · book · space · adult · space-fleet · military · violent-conflict · litrpg · space-opera · sci-fi · colonization · genetic-engineering · space-travel · war · invasion · galactic-empire · royalty · action-adventure · first-contact
All books in this series ❯
Asterion Noir
by G.S. Jennsen
4.39 · 18 ratings
cyberpunk · genetic-engineering · space · audiobook · galactic-empire · politics · suspense · colonization · book · technothriller · invasion · romance · space-fleet · adult · violent-conflict · first-contact · horror · military · space-travel · space-opera
All books in this series ❯
Halcyone Space
by L.J. Cohen
3.83 · 18 ratings
sci-fi · space-opera · galactic-empire · space · lgbtq · colonization · young-adult · action-adventure · fiction · exploration · space-travel · book · comics · ai · audiobook · alpha-mc · female-mc
All books in this series ❯
Lunar Free State
by John E. Siers
4.40 · 15 ratings
literary-fiction · book · invasion · aliens · exploration · fiction · action-adventure · colonization · galactic-empire · space-opera · space-travel · soldiers · sci-fi · space-fleet · space · violent-conflict · first-contact · military · war · adult
All books in this series ❯
The Reluctant Adventures of Fletcher Connolly on the Interstellar Railroad
by Felix R. Savage
3.85 · 20 ratings
space · book · exploration · fiction · action-adventure · humor · sci-fi · space-travel · audiobook · adult · colonization · galactic-empire · anti-hero · cyberpunk · dystopia · classics · supernatural · literary · space-opera · aliens
All books in this series ❯
Dead Enders
by Mike Resnick
3.09 · 11 ratings
space-opera · soldiers · sci-fi · violent-conflict · space-fleet · military · first-contact · espionage · action-adventure · aliens · exploration · fiction · galactic-empire · political-intrigue · space · book · space-travel · lgbtq · quest · genetic-engineering
All books in this series ❯
Folding Space
by A.M. Scott
4.26 · 19 ratings
book · exploration · fiction · sci-fi · galactic-empire · space-opera · space-travel · military · space-fleet · space · supernatural · violent-conflict · lgbtq · soldiers · aliens · action-adventure · young-adult · other-world · adult · time-travel
All books in this series ❯
Robot Empire
by Kevin Partner
4.11 · 9 ratings
adult · space · sci-fi · literary · space-opera · classics · action-adventure · fiction · book · galactic-empire · colonization · exploration · space-travel · military · space-fleet · violent-conflict · alpha-mc · ai · coming-of-age · female-mc
All books in this series ❯