Gemma-Hydrox: Similar series
Class 5
by Michelle Diener
4.16 · 125 ratings
ai · book · adult · sci-fi · fiction · space · romance · space-opera · military · aliens · action-adventure · galactic-empire · futuristic · female-mc · alpha-mc · multi-pov · audiobook · kidnapping · dark · paranormal
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World of Kalquor
by Tracy St. John
3.99 · 258 ratings
steamy · adult · sci-fi · aliens · fiction · book · paranormal · romance · space · futuristic · polyamory · space-opera · action-adventure · alpha-mc · dystopia · mlm · reverse-harem · military · space-travel · dark
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Inferno Force of the Drexian Warriors
by Tana Stone
4.42 · 61 ratings
book · romance · adult · sci-fi · aliens · fiction · paranormal · invasion · violent-conflict · first-contact · humor · action-adventure · female-mc · forced-proximity · steamy · workplace · galactic-empire · enemies-to-lovers · suspense · poc-mc
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Galaxy Alien Mail Order Brides
by Michelle M. Pillow
3.91 · 52 ratings
humor · aliens · fiction · book · audiobook · adult · sci-fi · paranormal · female-mc · romance · first-contact · space-opera · space-travel · steamy · contemporary · action-adventure · space · dragons · futuristic · sexual-assault
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The Pet Project
by Amanda Milo
3.92 · 26 ratings
invasion · romance · book · steamy · first-contact · slavery · adult · violent-conflict · dark · sci-fi · aliens · fiction · alpha-mc · paranormal · colonization · captivity · humor · futuristic · forced-proximity · dystopia
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Big Sky Alien Mail Order Brides
by Elsa Jade
3.95 · 32 ratings
romance · book · steamy · aliens · fiction · paranormal · sci-fi · adult · shapeshifters · urban-fantasy · contemporary · space · action-adventure · space-opera · fated-mates · alpha-mc · military · vampires · female-mc · exploration
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Shadows In Sanctuary
by Susan Trombley
4.14 · 35 ratings
aliens · fiction · adult · demons · supernatural · book · romance · paranormal · futuristic · female-author · sci-fi · steamy · dystopia · monsters · magic · new-adult · dark · captivity · genetic-engineering · prison
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Brides of the Hunt
by Jeanette Lynn
3.75 · 20 ratings
sci-fi · aliens · fiction · book · reverse-harem · steamy · romance · adult · polyamory · paranormal · humor · alpha-mc · contemporary · multiverse · barbarians · female-mc · domestic-drama · kidnapping · other-world · time-travel
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Galaxy Pirates
by Alana Khan
4.30 · 20 ratings
book · female-mc · aliens · fiction · action-adventure · paranormal · sci-fi · galactic-empire · adult · futuristic · romance · steamy · abuse · first-contact · alpha-mc · violent-conflict · invasion · shapeshifters · kidnapping · outlaws
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Verdantia
by Patricia A. Knight
3.84 · 32 ratings
book · steamy · romance · paranormal · aliens · action-adventure · fiction · sci-fi · adult · suspense · alpha-mc · magic · military · mlm · lgbtq · futuristic · dark · reverse-harem · kidnapping · royalty
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Warrior Clans of Maekon
by Jude Gray
4.06 · 18 ratings
female-mc · aliens · fiction · romance · book · first-contact · steamy · adult · paranormal · sci-fi · space-travel · action-adventure · invasion · kidnapping · violent-conflict · alpha-mc · dark · galactic-empire · psychics · barbarians
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Mate of the Tyger Prince
by Shannon West
4.03 · 59 ratings
mlm · book · shapeshifters · romance · paranormal · aliens · fiction · lgbtq · adult · sci-fi · enemies-to-lovers · steamy · royalty · supernatural · age-gap · action-adventure · captivity · dark · outlaws · angst
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Burning Metal
by Lisa Lace
3.57 · 21 ratings
audiobook · cyborgs · paranormal · romance · book · adult · sci-fi · fiction · military · poc-mc · aliens · action-adventure · alpha-mc · suspense · mlm · steamy · dangerous-mc · genetic-engineering · galactic-empire · abuse
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Dragon Lords
by Kiersten Fay
4.06 · 18 ratings
adult · magic · female-mc · witches-wizards · fantasy · aliens · fiction · paranormal · dragons · romance · steamy · book · shapeshifters · sci-fi · mythical-creatures · action-adventure · contemporary · alpha-mc · supernatural · new-adult
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Intergalactic Matchmaking Services
by Ava Louise
3.69 · 13 ratings
contemporary · book · romance · aliens · fiction · paranormal · sci-fi · adult · steamy · futuristic · humor · family · womens-fiction · abuse · suspense
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Children of the Dead Fall
by Susan Trombley
4.18 · 17 ratings
steamy · adult · paranormal · sci-fi · fiction · aliens · romance · book · vampires · polyamory · new-adult · multiverse · fated-mates · fantasy · reverse-harem
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Conquered Mates
by Athena Storm
4.27 · 37 ratings
adult · romance · fiction · sci-fi · book · paranormal · aliens · futuristic · dark · steamy · sexual-assault · dystopia · invasion · violent-conflict · new-adult · barbarians · omegaverse · captivity
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Sensual Abduction
by Amelia Wilson
3.82 · 11 ratings
vampires · witches-wizards · ghosts · fiction · psychics · shapeshifters · book · adult · demons · paranormal · poc-mc · aliens · humor · supernatural · steamy · audiobook · sci-fi · action-adventure · invasion · romance
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Warriors of Valkred
by Roxie Ray
4.07 · 14 ratings
book · romance · fiction · paranormal · sci-fi · adult · aliens · action-adventure · audiobook · royalty · vampires · alpha-mc · fated-mates · revenge · psychics · female-mc · suspense · magic · space · box-set
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Cryo Crisis Homeworld
by Deiri Di
4.09 · 11 ratings
military · adult · sci-fi · action-adventure · fiction · romance · book · violent-conflict · paranormal · aliens · steamy · time-travel · first-contact · invasion · space-fleet · demons · galactic-empire · supernatural · poc-mc · colonization
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Prison Moon
by Alexandra Marell
3.88 · 8 ratings
adult · sci-fi · aliens · fiction · book · romance · alpha-mc · dragons · paranormal · action-adventure · steamy · captivity · magic · survival · sexual-assault · slavery · anti-hero · dark · barbarians · female-mc
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Guardians of the Pattern
by Jaye McKenna
3.89 · 18 ratings
book · romance · mlm · politics · lgbtq · fiction · sci-fi · adult · medical · paranormal · killer · space · mystery · action-adventure · space-opera · dystopia · disability · suspense · futuristic · aliens
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Voyeur Moon
by Ravenna Tate
3.83 · 6 ratings
adult · sci-fi · fiction · book · steamy · aliens · paranormal · dark · kidnapping · futuristic · romance · slavery · alpha-mc · multi-pov · fantasy · love-triangle
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Stargazer
by Rena Marks
3.88 · 8 ratings
book · paranormal · sci-fi · adult · aliens · fiction · steamy · romance · fantasy · insta-love · cheating · domestic-drama
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