The Confederacy Treaty: Similar romance 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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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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Galactic Gladiators

by Anna Hackett

4.32 · 306 ratings

adult · sci-fi · aliens · fiction · romance · book · invasion · violent-conflict · military · first-contact · warriors · audiobook · paranormal · steamy · action-adventure · alpha-mc · space · suspense · female-mc · supernatural

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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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Imperial

by M.K. Eidem

4.32 · 63 ratings

adult · space-opera · sci-fi · aliens · fiction · alpha-mc · audiobook · paranormal · book · other-world · romance · violent-conflict · military · action-adventure · war · futuristic · space · steamy · space-travel · humor

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The Alliance

by S.E. Smith

4.12 · 120 ratings

aliens · fiction · romance · book · sci-fi · adult · paranormal · audiobook · post-apocalyptic · military · futuristic · action-adventure · dystopia · first-contact · violent-conflict · contemporary · invasion · space · steamy · space-travel

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Riv’s Sanctuary

by A.G. Wilde

4.12 · 44 ratings

dark · sci-fi · adult · futuristic · poc-mc · female-mc · fiction · aliens · action-adventure · humor · paranormal · alpha-mc · space · romance · kidnapping · book · first-contact · violent-conflict · galactic-empire · audiobook

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Aurora Rising

by G.S. Jennsen

4.13 · 66 ratings

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

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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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Dark World Mates

by Olivia Riley

3.97 · 60 ratings

aliens · fiction · adult · sci-fi · book · romance · action-adventure · female-mc · violent-conflict · first-contact · invasion · alpha-mc · slow-burn · military · space · suspense · paranormal · prison · monsters · space-opera

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Mail-Order Brides of Crakair

by Ava Ross

4.19 · 82 ratings

action-adventure · humor · romance · book · sci-fi · adult · fiction · aliens · galactic-empire · audiobook · invasion · colonization · violent-conflict · dystopia · steamy · insta-love · first-contact · paranormal · new-adult · soldiers

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Barbarians of the Sand Planet

by Tana Stone

4.25 · 106 ratings

sci-fi · adult · aliens · fiction · book · steamy · romance · action-adventure · female-mc · paranormal · first-contact · audiobook · violent-conflict · futuristic · invasion · warriors · fated-mates · humor · fantasy · historical

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Dark Space

by Lisa Henry

4.02 · 42 ratings

book · military · adult · violent-conflict · sci-fi · space-opera · aliens · fiction · action-adventure · futuristic · lgbtq · war · dystopia · space · angst · mlm · romance · dark · mystery · audiobook

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Sarazen Saga

by Isabel Wroth

4.15 · 52 ratings

aliens · fiction · paranormal · romance · book · shapeshifters · sci-fi · adult · fated-mates · contemporary · alpha-mc · invasion · first-contact · violent-conflict · space · steamy · kind-mc · insta-love · space-opera · children

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Tribute Brides of the Drexian Warriors

by Tana Stone

4.28 · 138 ratings

aliens · fiction · sci-fi · adult · romance · female-mc · action-adventure · first-contact · steamy · paranormal · book · military · violent-conflict · invasion · audiobook · contemporary · fated-mates · enemies-to-lovers · forced-proximity · monsters

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Star

by Susan Grant

3.97 · 69 ratings

romance · paranormal · aliens · fiction · sci-fi · adult · futuristic · book · action-adventure · steamy · galactic-empire · female-mc · space-opera · invasion · space · violent-conflict · first-contact · royalty · time-travel · anthologies

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Brion Brides

by Vi Voxley

4.06 · 84 ratings

action-adventure · aliens · fiction · adult · military · sci-fi · book · romance · steamy · alpha-mc · futuristic · violent-conflict · contemporary · paranormal · warriors · first-contact · invasion · war · female-mc · fated-mates

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Starfighter Training Academy

by Grace Goodwin

4.22 · 41 ratings

book · romance · paranormal · genetic-engineering · audiobook · action-adventure · fiction · sci-fi · adult · military · steamy · invasion · colonization · war · aliens · violent-conflict · space-fleet · first-contact · suspense · 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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The Ladyships

by Bex McLynn

4.25 · 24 ratings

paranormal · book · adult · sci-fi · fiction · romance · space-fleet · military · aliens · action-adventure · humor · futuristic · alpha-mc · steamy · kidnapping · invasion · violent-conflict · female-author · first-contact · dark

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Anguis Defenders

by Stephanie West

4.06 · 17 ratings

action-adventure · aliens · fiction · invasion · book · military · first-contact · alpha-mc · violent-conflict · adult · new-adult · sci-fi · humor · romance · futuristic · steamy · dark · paranormal · female-mc · kidnapping

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Unexpected

by Layla Stone

4.06 · 18 ratings

book · romance · paranormal · futuristic · aliens · fiction · sci-fi · adult · invasion · colonization · action-adventure · space-opera · violent-conflict · first-contact · kidnapping · steamy · abuse · galactic-empire · genetic-engineering · poc-mc

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