Diadem
by Jo Clayton
3.89 · 53 ratings
sci-fi · adult · book · action-adventure · fiction · political-intrigue · espionage · space-opera · female-author · violent-conflict · invasion · aliens · space · contemporary · pulp · 20th-century · historical · dystopia · industrial-era · western
Diadem: Similar series
Catteni
by Anne McCaffrey
3.96 · 124 ratings
sci-fi · space-travel · space-opera · female-author · first-contact · adult · violent-conflict · futuristic · aliens · fiction · action-adventure · audiobook · dystopia · space · invasion · romance · other-world · colonization · female-mc · survival
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Rho Agenda Chronological
by Richard Phillips
4.10 · 219 ratings
sci-fi · violent-conflict · action-adventure · fiction · audiobook · book · technothriller · suspense · aliens · first-contact · mystery · military · adult · invasion · space-opera · political-intrigue · espionage · politics · space · space-travel
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Confluence
by Jennifer Foehner Wells
4.09 · 118 ratings
aliens · exploration · fiction · female-mc · space-opera · space-travel · sci-fi · adult · book · space · action-adventure · violent-conflict · first-contact · invasion · audiobook · futuristic · military · female-author · technothriller · romance
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Linesman
by S.K. Dunstall
4.13 · 60 ratings
friendship · aliens · action-adventure · fiction · war · female-author · first-contact · military · space-fleet · adult · violent-conflict · sci-fi · space-opera · invasion · book · audiobook · space · exploration · futuristic · space-travel
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Mission Earth
by L. Ron Hubbard
3.44 · 220 ratings
sci-fi · space-opera · satire · adult · action-adventure · fiction · humor · book · violent-conflict · hard-sci-fi · aliens · political-intrigue · space · invasion · workplace · epic · espionage · military · first-contact · space-fleet
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Quadrail
by Timothy Zahn
3.85 · 88 ratings
space-opera · aliens · action-adventure · mystery · fiction · espionage · invasion · crime · book · first-contact · violent-conflict · space · suspense · sci-fi · political-intrigue · young-adult · law-enforcement · noir · adult
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Starship's Mage: Red Falcon
by Glynn Stewart
4.36 · 51 ratings
space-opera · aliens · exploration · fiction · invasion · action-adventure · war · book · audiobook · military · magic · adult · space-fleet · space · violent-conflict · soldiers · sci-fi · space-travel · urban-fantasy · mystery
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The Forgotten
by M.R. Forbes
4.15 · 48 ratings
sci-fi · space · genetic-engineering · adult · dystopia · military · audiobook · space-fleet · apocalyptic · book · violent-conflict · invasion · post-apocalyptic · action-adventure · aliens · fiction · space-opera · political-intrigue · conspiracies · war
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Web Shifters
by Julie E. Czerneda
4.07 · 41 ratings
book · shapeshifters · action-adventure · fiction · aliens · exploration · paranormal · space-opera · sci-fi · audiobook · female-author · space · adult · survival · hard-sci-fi · invasion · conspiracies · suspense · political-intrigue · violent-conflict
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Aurora Rising
by G.S. Jennsen
4.13 · 66 ratings
first-contact · military · sci-fi · space-opera · space-travel · fiction · action-adventure · cyberpunk · galactic-empire · colonization · book · space-fleet · violent-conflict · aliens · exploration · space · ai · romance · adult · soldiers
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Claimings
by Lyn Gala
4.17 · 63 ratings
mlm · steamy · book · romance · audiobook · paranormal · aliens · fiction · lgbtq · age-gap · adult · sci-fi · space · friends-to-lovers · action-adventure · slow-burn · violent-conflict · military · angst · invasion
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Star Trek: The Mirror Universe Trilogy
by William Shatner
3.74 · 36 ratings
audiobook · invasion · aliens · fiction · multiverse · action-adventure · space-opera · sci-fi · adult · space · genetic-engineering · violent-conflict · military · male-author · book · female-author · anthologies · pulp · alternate-history
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Tales of the Terran Republic
by Charles E. Gannon
3.90 · 48 ratings
action-adventure · fiction · book · violent-conflict · space · adult · military · space-opera · sci-fi · aliens · exploration · survival · first-contact · political-intrigue · war · invasion · espionage · audiobook · space-travel · virtual-reality
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Children of a Dead Earth
by Patrick S. Tomlinson
3.86 · 28 ratings
colonization · invasion · book · audiobook · space · dystopia · action-adventure · mystery · aliens · fiction · crime · violent-conflict · adult · sci-fi · space-opera · dying-earth · police-procedural · conspiracies · political-intrigue · humor
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Craving the Heveians
by Ella Blake
4.39 · 46 ratings
adult · sci-fi · aliens · fiction · fantasy · romance · book · fated-mates · steamy · first-contact · audiobook · multi-pov · female-author · action-adventure · violent-conflict · space-opera · invasion · paranormal · dark · insta-love
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Eschaton Sequence
by Frederik Pohl
3.37 · 27 ratings
aliens · fiction · book · invasion · violent-conflict · adult · audiobook · first-contact · sci-fi · action-adventure · espionage · dystopia · political-intrigue · time-travel · space · contemporary · space-opera · space-travel
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OtherWorldly Men
by Susan Grant
3.85 · 26 ratings
space-opera · female-mc · aliens · fiction · humor · futuristic · action-adventure · romance · book · first-contact · adult · alpha-mc · paranormal · sci-fi · invasion · contemporary · space · violent-conflict · assassins · political-intrigue
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Star Trek: The Captain's Table
by Peter David
3.69 · 45 ratings
adult · action-adventure · fiction · sci-fi · space · book · invasion · aliens · space-opera · military · female-author · genetic-engineering · violent-conflict · anthologies · survival
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The Sentinels
by Jack McKinney
3.69 · 36 ratings
sci-fi · military · book · action-adventure · fiction · space-opera · space · violent-conflict · war · politics · adult · teens · political-intrigue · epic · contemporary · invasion · espionage · young-adult · aliens · earth
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Skeen
by Jo Clayton
3.89 · 18 ratings
action-adventure · aliens · invasion · fiction · book · female-author · violent-conflict · space · adult · sci-fi · space-opera · low-fantasy · espionage · political-intrigue · mystery · lgbtq · space-travel
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The Eurynome Code
by K. Gorman
4.27 · 22 ratings
book · space · fiction · violent-conflict · adult · space-fleet · military · female-author · first-contact · space-opera · sci-fi · colonization · genetic-engineering · audiobook · galactic-empire · action-adventure · aliens · female-mc · space-travel · soldiers
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Reunification
by Julie E. Czerneda
4.06 · 16 ratings
aliens · fiction · paranormal · sci-fi · space-opera · female-author · first-contact · space · adult · hard-sci-fi · invasion · violent-conflict · book · colonization · psychics · action-adventure · military · exploration · politics · assassins
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Diadem
by Jo Clayton
3.89 · 53 ratings
sci-fi · adult · book · action-adventure · fiction · political-intrigue · espionage · space-opera · female-author · violent-conflict · invasion · aliens · space · contemporary · pulp · 20th-century · historical · dystopia · industrial-era · western
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Genmate Dilemma
by Cara Bristol
4.50 · 6 ratings
life-death · space-travel · sci-fi · adult · violent-conflict · first-contact · secrets · fated-mates · aliens · fiction · action-adventure · psychics · enemies-to-lovers · paranormal · suspense · genetic-engineering · contemporary · shapeshifters · book · steamy
All books in this series ❯