The Humanity Unlimited Saga: Similar romance 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

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The Genesis Fleet

by Jack Campbell

4.13 · 63 ratings

action-adventure · soldiers · sci-fi · space-opera · space-travel · military · audiobook · adult · space-fleet · space · violent-conflict · war · book · colonization · exploration · fiction · politics

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Duchy of Terra Universe

by Glynn Stewart

4.41 · 170 ratings

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

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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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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

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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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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

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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

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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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Crimson Worlds Refugees

by Jay Allan

4.29 · 60 ratings

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

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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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Crimson Worlds

by Jay Allan

4.11 · 172 ratings

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

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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 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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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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Aurora Rhapsody

by G.S. Jennsen

4.27 · 113 ratings

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

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Ganog Wars

by Chris Fox

4.29 · 24 ratings

cyborgs · invasion · male-mc · space-fleet · book · action-adventure · aliens · exploration · fiction · soldiers · sci-fi · space-opera · space-travel · galactic-empire · military · audiobook · space · violent-conflict · adult

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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

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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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Aurora Renegades

by G.S. Jennsen

4.46 · 28 ratings

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

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Amaranthe

by G.S. Jennsen

4.32 · 122 ratings

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

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