Underground: Similar series
Naga Brides
by Naomi Lucas
3.75 · 287 ratings
aliens · monsters · audiobook · explicit-open-door · m-f · science fiction · non-human-hero · possessive hero · dual-pov · death · length-medium · fantasy · futuristic · alpha male · breeding · creative-anatomy · age difference · forced proximity · male-pov · fated-mates
All books in this series ❯
Confederation of Valor
by Tanya Huff
4.08 · 153 ratings
strong heroine · audiobook · military · futuristic · war · science fiction · aliens · survival · fantasy · paranormal · length-medium · humor · length-long · queer · time travel · mystery · suspense · pirates · m-f
All books in this series ❯
In Her Name: Redemption
by Michael R. Hicks
4.14 · 89 ratings
military · aliens · length-medium · science fiction · dystopian · fantasy · contemporary · urban fantasy · paranormal · war · magic · young adult
All books in this series ❯
Sponsored links
Metahuman Files
by Hailey Turner
4.18 · 167 ratings
science fiction · mental-trauma · military · war · anal sex · third-person-pov · dual-pov · men in uniform · north-america · fetish · dystopian · superheroes · futuristic · super rich hero · male-pov · paranormal · suspense · audiobook · m-m · queer
All books in this series ❯
Intersolar Union
by Etta Pierce
4.12 · 179 ratings
explicit-open-door · science fiction · non-human-hero · m-f · aliens · multicultural · possessive hero · competent heroine · strong heroine · slow burn · third-person-pov · creative-anatomy · first-person-pov · human-trafficking · rape-non-mc · length-medium · independent heroine · dual-pov · abduction · graphic-violence
All books in this series ❯
Raider Warlords of the Vandar
by Tana Stone
4.08 · 228 ratings
aliens · science fiction · audiobook · alpha male · humor · explicit-open-door · possessive hero · length-short · military · from hate to love · m-f · fated-mates · length-medium · strong heroine · commander · competent heroine · war · virgin heroine · futuristic · independent heroine
All books in this series ❯
Unknown
by Wendy Higgins
4.26 · 49 ratings
science fiction · futuristic · aliens · dystopian · new adult · length-medium · military · young adult · length-short · suspense · urban fantasy · siblings-bff
All books in this series ❯
Enhanced World
by Victoria Sue
4.07 · 114 ratings
m-m · queer · paranormal · fantasy · military · audiobook · mystery · suspense · urban fantasy · contemporary · length-medium · height-difference · abuse · science fiction · men in uniform · from hate to love · futuristic · age difference · superheroes · dual-pov
All books in this series ❯
Collapse
by Summer Lane
4.06 · 74 ratings
dystopian · contemporary · futuristic · new adult · length-medium · science fiction · length-short · alpha male · military · suspense · war · horror · men in uniform · young adult
All books in this series ❯
Disco Space Opera
by Cat Rambo
3.80 · 44 ratings
magic · science fiction · queer · fantasy · humor · length-medium · paranormal · military · audiobook · found-family · aliens · mystery · pirates · death
All books in this series ❯
The Sky Clan of the Taori
by Tana Stone
4.39 · 49 ratings
science fiction · audiobook · m-f · aliens · vengeance · strong heroine · alpha male · length-short · military · time travel · fated-mates · humor · length-medium · marriage of convenience · height-difference · abduction · suspense · paranormal · competent heroine · dual-pov
All books in this series ❯
The Dead Saga
by Claire C. Riley
4.23 · 76 ratings
science fiction · dystopian · audiobook · length-medium · horror · futuristic · military · fantasy · humor · post-apocalyptic · paranormal · fighters · dual-pov · survival · length-short · bikers · child-death · suspense · tortured heroine · love triangle
All books in this series ❯
Blades of Arris
by Starla Night
4.18 · 44 ratings
audiobook · science fiction · length-medium · aliens · dual-pov · m-f · alpha male · shapeshifters · abduction · military · futuristic · survival · from hate to love · non-human-hero · asexual-hero · forced proximity · fantasy · strong heroine · suspense · competent heroine
All books in this series ❯
Captive Mates
by Corin Cain
4.10 · 62 ratings
science fiction · reverse harem · paranormal · poly · fated-mates · length-medium · aliens · fantasy · length-short · military · futuristic · m-m-f · alpha male · bdsm · shapeshifters · cold hero · abuse · explicit-plentiful · menage · non-human-hero
All books in this series ❯
Genetically Modified
by Holly S. Roberts
4.07 · 30 ratings
audiobook · shapeshifters · paranormal · dystopian · aliens · fantasy · m-f · military · length-short · urban fantasy · found-family · demons · suspense · length-medium · strong heroine · science fiction · futuristic · new adult · horror · dark
All books in this series ❯
Ardulum
by J.S. Fields
4.26 · 24 ratings
science fiction · queer · audiobook · f-f · length-medium · military · bisexual · fantasy · aliens · length-short
All books in this series ❯
Taurean Warriors
by Melody Beckett
4.00 · 10 ratings
military · science fiction · futuristic · dual-pov · m-f · multicultural · non-human-hero · length-medium · forced proximity · aliens · men in uniform · shy heroine · fantasy · friends to lovers · dystopian · war · length-short
All books in this series ❯
Atrophy
by Jess Anastasi
4.00 · 13 ratings
length-medium · science fiction · futuristic · fantasy · paranormal · military · audiobook · urban fantasy · aliens
All books in this series ❯
Kate Rudolph Collections
by Kate Rudolph
4.40 · 15 ratings
science fiction · length-medium · military · audiobook · paranormal · aliens · fantasy · length-long · length-epic
All books in this series ❯
Dark Desires Origins
by Nina Croft
4.20 · 5 ratings
fantasy · vampires · science fiction · audiobook · shapeshifters · paranormal · military · length-medium · witches · urban fantasy · humor · demons · futuristic
All books in this series ❯