In the Time of the Sixth Sun: Similar romance series

The Human Division

by John Scalzi

4.07 · 243 ratings

adult · violent-conflict · military · space-opera · space-travel · sci-fi · fiction · aliens · space · soldiers · humor · action-adventure · exploration · war · genetic-engineering · audiobook · galactic-empire · colonization · book · first-contact

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Extinction Wars

by Vaughn Heppner

4.07 · 72 ratings

book · first-contact · invasion · action-adventure · aliens · exploration · colonization · fiction · space-opera · galactic-empire · space-travel · soldiers · sci-fi · violent-conflict · space · space-fleet · adult · military · audiobook · war

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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

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Shadow of Terra

by Glynn Stewart

4.41 · 41 ratings

first-contact · audiobook · military · space-fleet · adult · violent-conflict · space · soldiers · galactic-empire · sci-fi · space-travel · space-opera · aliens · exploration · action-adventure · fiction · invasion · war · book

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Portal Wars

by Jay Allan

3.99 · 38 ratings

soldiers · exploration · fiction · action-adventure · aliens · sci-fi · colonization · war · book · invasion · space-fleet · adult · dystopia · space · violent-conflict · first-contact · audiobook · military · galactic-empire · space-travel

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Dark Space

by Jasper T. Scott

3.84 · 82 ratings

invasion · space-fleet · book · galactic-empire · audiobook · space · fiction · aliens · sci-fi · space-opera · military · violent-conflict · adult · historical · supernatural · genetic-engineering · dystopia · cyberpunk · steampunk · industrial-era

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Earthrise

by Daniel Arenson

4.01 · 136 ratings

aliens · exploration · fiction · military · adult · space-fleet · violent-conflict · soldiers · sci-fi · space-opera · space-travel · colonization · invasion · book · space · galactic-empire · first-contact · audiobook · action-adventure · dystopia

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The Last War

by Peter Bostrom

4.09 · 34 ratings

aliens · exploration · colonization · fiction · book · technothriller · invasion · genetic-engineering · space · space-fleet · adult · military · violent-conflict · first-contact · space-travel · space-opera · galactic-empire · soldiers · sci-fi · action-adventure

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The Salvage Title Trilogy

by Kevin Steverson

4.31 · 33 ratings

space · invasion · war · book · literary-fiction · colonization · aliens · action-adventure · exploration · fiction · soldiers · galactic-empire · sci-fi · ai · space-opera · space-travel · first-contact · military · space-fleet · adult

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The Last Hunter

by J.N. Chaney

4.44 · 127 ratings

book · invasion · aliens · fiction · colonization · galactic-empire · space-opera · soldiers · sci-fi · adult · space-fleet · space · genetic-engineering · violent-conflict · military · first-contact · action-adventure · audiobook · exploration · space-travel

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Star Cross

by Raymond L. Weil

4.47 · 30 ratings

space-opera · space-travel · galactic-empire · soldiers · sci-fi · space · violent-conflict · adult · slavery · military · space-fleet · first-contact · book · invasion · aliens · exploration · fiction · colonization · ai · war

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The Farian War

by K.B. Wagers

4.03 · 29 ratings

lgbtq · female-mc · action-adventure · fiction · sci-fi · aliens · space-opera · military · first-contact · violent-conflict · adult · invasion · book · politics · audiobook · space · prophecy · wlw · exploration · space-travel

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Daedalus

by Michael J. Martinez

3.76 · 25 ratings

steampunk · space · invasion · time-travel · book · historical-fiction · historical · adult · violent-conflict · sci-fi · space-opera · alternate-history · aliens · exploration · fiction · action-adventure · industrial-era · audiobook · post-apocalyptic · first-contact

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The Ixan Universe

by Scott Bartlett

3.94 · 54 ratings

fiction · soldiers · sci-fi · space-opera · military · adult · space-fleet · violent-conflict · book · galactic-empire · audiobook · space · hard-sci-fi · aliens · first-contact · invasion · colonization · action-adventure · space-travel · supernatural

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Forgotten Starship

by M.R. Forbes

4.33 · 36 ratings

invasion · futuristic · violent-conflict · book · aliens · exploration · fiction · sci-fi · space-opera · space-travel · galactic-empire · military · first-contact · space · genetic-engineering · adult · dystopia · space-fleet · soldiers · post-apocalyptic

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War Wolves

by Jonathan Yanez

4.20 · 20 ratings

space-fleet · invasion · book · colonization · aliens · exploration · fiction · soldiers · sci-fi · space-opera · space-travel · military · first-contact · space · violent-conflict · adult · action-adventure · galactic-empire · genetic-engineering · supernatural

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The Pike Chronicles

by G.P. Hudson

4.00 · 26 ratings

fiction · action-adventure · soldiers · galactic-empire · sci-fi · space-travel · space-opera · first-contact · military · adult · violent-conflict · space · invasion · book · colonization · aliens · exploration · supernatural

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The Eurynome Code

by K. Gorman

4.27 · 22 ratings

fiction · adult · space-fleet · violent-conflict · female-author · first-contact · military · space-opera · sci-fi · book · space · aliens · action-adventure · female-mc · space-travel · soldiers · colonization · genetic-engineering · audiobook · galactic-empire

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