Halberd
by John Spearman
4.43 · 21 ratings
military · book · space-opera · sci-fi · space-fleet · fiction · action-adventure · adult · literary-fiction · romance · fantasy · violent-conflict · space
Halberd: Similar series
Cosmos' Gateway
by S.E. Smith
4.17 · 138 ratings
audiobook · contemporary · alpha-mc · romance · sci-fi · aliens · fiction · paranormal · invasion · book · first-contact · military · space-fleet · adult · violent-conflict · soldiers · action-adventure · futuristic · steamy · alternate-history
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The Adventures of a Xeno-Archaeologist
by Jenny Schwartz
4.33 · 84 ratings
adult · first-contact · military · space-opera · sci-fi · action-adventure · aliens · fiction · futuristic · space · ai · supernatural · exploration · super-powered · cyberpunk · galactic-empire · book · romance · space-fleet · space-travel
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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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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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Accidental Alien Brides
by January Bell
4.22 · 64 ratings
romance · sci-fi · adult · aliens · fiction · action-adventure · paranormal · steamy · book · first-contact · military · fated-mates · humor · arranged-marriage · invasion · space-fleet · violent-conflict · forced-proximity · dark · monsters
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Starlight's Shadow
by Jessie Mihalik
4.21 · 38 ratings
action-adventure · fiction · military · sci-fi · space-opera · romance · book · aliens · adult · space-fleet · female-mc · fantasy · slow-burn · crime · audiobook · space · alpha-mc · found-family · mystery · futuristic
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Shamans & Shifters Space Opera
by Jenny Schwartz
4.33 · 46 ratings
romance · shapeshifters · book · paranormal · space · aliens · fiction · action-adventure · sci-fi · space-travel · space-opera · first-contact · adult · futuristic · outlaws · space-fleet · magic · fae · colonization · galactic-empire
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The Theogony
by Chris Kennedy
3.95 · 27 ratings
violent-conflict · invasion · war · literary-fiction · book · colonization · exploration · fiction · aliens · soldiers · sci-fi · galactic-empire · space-opera · space-travel · military · audiobook · adult · space-fleet · space · action-adventure
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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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Magitech World
by Chris Fox
4.21 · 38 ratings
book · exploration · fiction · epic · soldiers · space-travel · galactic-empire · audiobook · military · violent-conflict · space · space-fleet · adult · action-adventure · space-opera · magic · fantasy · aliens · high-fantasy · sci-fi
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Halberd
by John Spearman
4.43 · 21 ratings
military · book · space-opera · sci-fi · space-fleet · fiction · action-adventure · adult · literary-fiction · romance · fantasy · violent-conflict · space
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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
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Empire
by Richard F. Weyand
4.52 · 48 ratings
galactic-empire · space-opera · sci-fi · adult · space · book · fiction · soldiers · space-fleet · military · colonization · action-adventure · romance · violent-conflict · urban-fantasy · alternate-history · politics · female-mc · law-enforcement · fantasy
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Universe on Fire
by Ivan Kal
4.29 · 21 ratings
space-opera · galactic-empire · soldiers · violent-conflict · adult · magic · military · book · fiction · space-travel · first-contact · space-fleet · invasion · aliens · exploration · dragons · sci-fi · paranormal · space · litrpg
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Sandy Pike
by John Spearman
4.27 · 15 ratings
space-opera · book · adult · fiction · military · space-fleet · literary-fiction · sci-fi · romance · space · violent-conflict · action-adventure · fantasy
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Sons of Lyra
by Felicity Heaton
3.85 · 20 ratings
space-opera · paranormal · sci-fi · space-fleet · adult · military · romance · action-adventure · aliens · fiction · space-travel · galactic-empire · soldiers · book · exploration · supernatural · futuristic · box-set · steamy · anthologies
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Gladiators of the Vagabond
by Robin O'Connor
4.42 · 33 ratings
book · romance · sci-fi · adult · aliens · fiction · paranormal · fantasy · action-adventure · military · alpha-mc · time-travel · space-opera · suspense · steamy · slavery · shapeshifters · crime · fated-mates · humor
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Fated Mates of the Varool
by Krista Luna
4.28 · 32 ratings
fiction · aliens · adult · humor · sci-fi · action-adventure · romance · violent-conflict · invasion · fated-mates · space-travel · space-opera · genetic-engineering · paranormal · female-mc · military · soldiers · book · fantasy · comics
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Daughters of Lyra
by Felicity Heaton
4.00 · 18 ratings
space-opera · sci-fi · adult · romance · action-adventure · fiction · space-travel · galactic-empire · paranormal · space-fleet · military · book · aliens · supernatural · exploration · vampires · soldiers · steamy · futuristic · box-set
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The Interscission Project
by Arshad Ahsanuddin
4.08 · 13 ratings
paranormal · action-adventure · fiction · mlm · book · time-travel · lgbtq · romance · adult · military · audiobook · space-opera · sci-fi · futuristic · space-fleet · mystery · age-gap · mind-games · space-travel · alternate-universe
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The Lost Fleet
by Sarah Hawke
4.44 · 9 ratings
fiction · space-opera · galactic-empire · military · space-fleet · adult · book · steamy · action-adventure · sci-fi · audiobook · polyamory · male-mc · harem · aliens · violent-conflict · romance · dark · law-enforcement · war
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Outer Settlement Agency
by Lyn Brittan
3.67 · 9 ratings
military · adult · sci-fi · aliens · action-adventure · fiction · romance · book · humor · paranormal · space-fleet · dystopia · galactic-empire · soldiers · space-opera · colonization · poc-mc · black-mc · billionaire · steamy
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Nomad Series
by K.A. Finn
3.80 · 5 ratings
space-opera · suspense · genetic-engineering · space-fleet · military · audiobook · sci-fi · book · fiction · action-adventure · adult · dystopia · space · romance · mlm · dark · cyborgs · drama · fighter · psychological
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Astral Heat
by Laura Navarre
4.50 · 8 ratings
sci-fi · fiction · space · galactic-empire · adult · lgbtq · paranormal · reverse-harem · steamy · anthologies · romance · myths · mlm · supernatural · book · space-fleet · polyamory · military · space-opera · fantasy
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