Underground: Similar series
Vatta's War
by Elizabeth Moon
4.05 · 173 ratings
science fiction · military · audiobook · pirates · aliens · war · futuristic · length-long · strong heroine · length-medium · mystery · new adult · first-in-series · standalone-first · young adult
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Confederation of Valor
by Tanya Huff
4.08 · 153 ratings
strong heroine · military · audiobook · futuristic · war · science fiction · aliens · survival · paranormal · length-medium · humor · fantasy · mystery · time travel · length-long · queer · suspense · pirates · standalone-first · first-in-series
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In Her Name: Redemption
by Michael R. Hicks
4.14 · 89 ratings
length-medium · military · aliens · dystopian · paranormal · urban fantasy · contemporary · fantasy · science fiction · young adult · first-in-series · magic · standalone-first · war
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Metahuman Files
by Hailey Turner
4.17 · 172 ratings
dystopian · fetish · north-america · men in uniform · dual-pov · third-person-pov · anal sex · war · military · mental-trauma · science fiction · queer · m-m · audiobook · suspense · paranormal · male-pov · super rich hero · futuristic · superheroes
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Enhanced World
by Victoria Sue
4.06 · 124 ratings
m-m · queer · paranormal · audiobook · fantasy · mystery · military · science fiction · suspense · contemporary · urban fantasy · length-medium · height-difference · abuse · men in uniform · from hate to love · dual-pov · futuristic · age difference · superheroes
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Unknown
by Wendy Higgins
4.26 · 49 ratings
aliens · dystopian · science fiction · futuristic · military · length-medium · new adult · first-in-series · urban fantasy · standalone-first · young adult · suspense · siblings-bff · length-short
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Disco Space Opera
by Cat Rambo
3.77 · 46 ratings
military · audiobook · found-family · magic · paranormal · length-medium · science fiction · queer · fantasy · humor · aliens · standalone-first · first-in-series · death · pirates · mystery
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Collapse
by Summer Lane
4.06 · 75 ratings
dystopian · contemporary · futuristic · new adult · length-medium · length-short · science fiction · suspense · military · alpha male · war · young adult · horror · standalone-first · men in uniform · first-in-series
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Blades of Arris
by Starla Night
4.24 · 64 ratings
science fiction · audiobook · aliens · length-medium · military · shapeshifters · abduction · dual-pov · m-f · alpha male · futuristic · from hate to love · survival · asexual-hero · forced proximity · fantasy · non-human-hero · strong heroine · competent heroine · paranormal
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The Sky Clan of the Taori
by Tana Stone
4.31 · 52 ratings
science fiction · m-f · audiobook · aliens · vengeance · alpha male · strong heroine · length-short · military · time travel · humor · fated-mates · length-medium · explicit-open-door · abduction · marriage of convenience · height-difference · dual-pov · paranormal · competent heroine
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Ravens
by Sue Laybourn
4.39 · 31 ratings
military · dual-pov · queer · m-m · length-medium · forced proximity · betrayal · alpha male · audiobook · contemporary · third-person-pov · suspense · from hate to love · forbidden love · science fiction · disabilities and marks · first-in-series · standalone-first · torture-mcs · abuse-non-mc
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Rogue Bonds
by Laura Taylor
4.00 · 31 ratings
futuristic · aliens · forced proximity · slavery · m-m · science fiction · queer · anal sex · non-human-hero · explicit-open-door · military · first-person-pov · tortured hero · angst · dub-con · dual-pov · male-pov · sweet-hero · childfree-couple · length-medium
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The Dead Saga
by Claire C. Riley
4.23 · 76 ratings
dystopian · science fiction · audiobook · length-medium · horror · futuristic · military · fantasy · humor · cliffhanger · post-apocalyptic · fighters · dual-pov · length-short · survival · paranormal · alpha male · other-man-woman · dark · abuse
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Variant
by Sandra R. Neeley
4.33 · 45 ratings
fantasy · length-medium · science fiction · futuristic · military · explicit-open-door · alpha male · paranormal · sweet heroine · other-man-woman · bad boys · possessive hero · standalone-first · first-in-series · length-long · second chances · open-door · dark · usa · abuse-non-mc
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Genetically Modified
by Holly S. Roberts
4.07 · 30 ratings
shapeshifters · audiobook · dystopian · aliens · fantasy · paranormal · length-short · m-f · military · science fiction · futuristic · new adult · found-family · urban fantasy · first-in-series · standalone-first · demons · suspense · length-medium · strong heroine
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Ardulum
by J.S. Fields
4.26 · 24 ratings
f-f · science fiction · queer · audiobook · length-medium · military · bisexual · fantasy · aliens · first-in-series · standalone-first · length-short
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The Sector Fleet
by Nicola Claire
4.53 · 15 ratings
futuristic · science fiction · military · audiobook · length-medium · first-in-series · standalone-first
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Atrophy
by Jess Anastasi
4.00 · 13 ratings
length-medium · science fiction · futuristic · fantasy · aliens · paranormal · military · audiobook · first-in-series · standalone-first · urban fantasy
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Kate Rudolph Collections
by Kate Rudolph
4.40 · 15 ratings
science fiction · length-medium · military · aliens · length-long · fantasy · audiobook · paranormal · first-in-series · length-epic · standalone-first
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Triton Core
by Theresa Beachman
4.57 · 7 ratings
length-medium · suspense · military · poly · science fiction · queer · m-m-m · m-f · standalone-first · first-in-series
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Dark Desires Origins
by Nina Croft
4.20 · 5 ratings
paranormal · audiobook · shapeshifters · fantasy · science fiction · vampires · length-medium · military · demons · first-in-series · urban fantasy · standalone-first · witches · futuristic · humor
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The Shielded
by Christine DePetrillo
4.00 · 1 ratings
science fiction · futuristic · young adult · military · length-medium · m-f · standalone-first · first-in-series · length-short
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