The Portal Connection
by Jade Thorn
4.17 · 12 ratings
new-adult · aliens · fiction · sci-fi · urban-fantasy · reverse-harem · book · slow-burn · romance · adult · polyamory · paranormal · dark · action-adventure · psychics · poc-mc · age-gap · invasion · dystopia · violent-conflict
The Portal Connection: Similar series
Kinsmen
by Ilona Andrews
4.17 · 124 ratings
space-opera · assassins · sci-fi · adult · magic · futuristic · action-adventure · fiction · female-mc · political-intrigue · paranormal · space · alpha-mc · audiobook · steamy · romance · urban-fantasy · drama · slow-burn · aliens
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Sirantha Jax
by Ann Aguirre
3.89 · 181 ratings
aliens · fiction · action-adventure · female-mc · futuristic · military · space-opera · sci-fi · urban-fantasy · book · romance · space · alpha-mc · paranormal · space-travel · dystopia · audiobook · mystery · psychics · war
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Steel Demons MC
by Crystal Ash
4.42 · 233 ratings
dystopia · supernatural · romance · book · reverse-harem · adult · biker · fiction · paranormal · post-apocalyptic · steamy · polyamory · new-adult · futuristic · apocalyptic · urban-fantasy · dark · female-mc · alpha-mc · harem
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The Firebird Chronicles
by T.A. White
4.52 · 112 ratings
fiction · space-opera · sci-fi · urban-fantasy · book · paranormal · action-adventure · humor · aliens · female-mc · friendship · slow-burn · futuristic · magic · military · romance · space · alpha-mc · dystopia · adult
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The Messenger Chronicles
by Pippa DaCosta
4.14 · 86 ratings
polyamory · reverse-harem · book · romance · fae · urban-fantasy · paranormal · dystopia · space · alpha-mc · audiobook · fiction · fantasy · action-adventure · female-mc · new-adult · adult · magic · harem · political-intrigue
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Phoenix Rising
by Quinn Arthurs
4.27 · 117 ratings
fantasy · fiction · polyamory · new-adult · mlm · romance · book · reverse-harem · shapeshifters · paranormal · psychics · university · fated-mates · magic · urban-fantasy · steamy · slow-burn · lgbtq · supernatural · multi-pov
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Captured by Aliens
by A.G. Wilde
4.03 · 77 ratings
fiction · aliens · action-adventure · female-mc · adult · first-contact · sci-fi · book · steamy · romance · paranormal · dark · kidnapping · alpha-mc · galactic-empire · humor · poc-mc · slow-burn · violent-conflict · invasion
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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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The Phoenix Project Duet
by Candice M. Wright
4.20 · 57 ratings
genetic-engineering · contemporary · paranormal · book · reverse-harem · romance · adult · polyamory · fiction · fantasy · medical · military · new-adult · action-adventure · crime · friends-to-lovers · dystopia · enemies-to-lovers · supernatural · urban-fantasy
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Claimings
by Lyn Gala
4.17 · 63 ratings
aliens · fiction · age-gap · lgbtq · adult · sci-fi · mlm · romance · steamy · book · audiobook · paranormal · action-adventure · slow-burn · military · violent-conflict · space · friends-to-lovers · futuristic · female-author
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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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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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Roh'ilian Warrior
by Luna Kingsley
3.97 · 51 ratings
female-mc · aliens · fiction · action-adventure · first-contact · military · historical · adult · violent-conflict · sci-fi · invasion · romance · book · paranormal · dark · new-adult · kind-mc · kidnapping · abuse · alpha-mc
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Outer Limits Quadrant
by Alexis B. Osborne
4.02 · 27 ratings
paranormal · romance · steamy · book · military · adult · sci-fi · action-adventure · aliens · fiction · monsters · space · genetic-engineering · galactic-empire · invasion · first-contact · violent-conflict · soldiers · dark · space-travel
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The Ravager Chronicles
by Sara Page
3.86 · 42 ratings
polyamory · steamy · adult · sci-fi · aliens · fiction · paranormal · romance · book · reverse-harem · space-opera · poc-mc · action-adventure · space · military · fated-mates · royalty · first-contact · violent-conflict · space-fleet
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Veredian Chronicles
by Regine Abel
4.35 · 64 ratings
fiction · sci-fi · adult · paranormal · romance · book · action-adventure · aliens · humor · new-adult · soldiers · military · genetic-engineering · steamy · colonization · futuristic · invasion · reverse-harem · female-author · first-contact
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Vrisha Warriors
by Olivia Riley
4.19 · 26 ratings
adult · romance · book · slow-burn · action-adventure · aliens · sci-fi · fiction · paranormal · first-contact · invasion · colonization · enemies-to-lovers · multi-pov · space · forced-proximity · monsters · exploration · soldiers · dark
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Anguis Defenders
by Stephanie West
4.06 · 17 ratings
aliens · fiction · new-adult · sci-fi · military · first-contact · alpha-mc · violent-conflict · adult · invasion · book · action-adventure · dark · paranormal · romance · futuristic · steamy · humor · biker · suspense
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The Slave Girl Chronicles
by J.C. Andrijeski
3.82 · 21 ratings
colonization · poc-mc · supernatural · paranormal · sci-fi · dystopia · violent-conflict · first-contact · book · invasion · post-apocalyptic · aliens · fiction · young-adult · new-adult · alpha-mc · futuristic · warriors · action-adventure · romance
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Prison World
by Julie K. Cohen
4.00 · 24 ratings
sci-fi · adult · fiction · romance · book · reverse-harem · dark · space-travel · space-opera · polyamory · female-mc · alternate-history · action-adventure · humor · suspense · steamy · new-adult · military · aliens · paranormal
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Unexpected
by Layla Stone
4.06 · 18 ratings
romance · book · paranormal · futuristic · aliens · fiction · sci-fi · adult · invasion · colonization · action-adventure · space-opera · first-contact · violent-conflict · kidnapping · steamy · abuse · galactic-empire · genetic-engineering · poc-mc
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Space Mage
by Izzy Shows
3.91 · 11 ratings
genetic-engineering · cyberpunk · galactic-empire · supernatural · urban-fantasy · book · invasion · violent-conflict · adult · military · space-fleet · first-contact · space-travel · soldiers · sci-fi · action-adventure · aliens · exploration · fiction · suspense
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Intergalactic Enosis: The Pyxis System
by Aurora Welkin
4.30 · 10 ratings
reverse-harem · book · aliens · fiction · romance · paranormal · sci-fi · adult · shapeshifters · action-adventure · genetic-engineering · military · polyamory · invasion · poc-mc · space-fleet · violent-conflict · sexual-assault · fantasy · psychics
All books in this series ❯