The Underground: Similar series
Sci-Regency
by J.L. Langley
3.91 · 159 ratings
historical · queer · m-m · futuristic · science fiction · regency · fantasy · military · length-medium · mystery · bdsm · paranormal · age difference · aliens · royalty · length-novella · suspense · war · erotica · men in uniform
All books in this series ❯
Metahuman Files: Classified
by Hailey Turner
4.26 · 46 ratings
fetish · military · superheroes · explicit-open-door · anal sex · futuristic · male-pov · dual-pov · men in uniform · length-novella · audiobook · third-person-pov · paranormal · suspense · dystopian · science fiction · queer · m-m · usa · europe
All books in this series ❯
The Thresl Chronicles
by Amber Kell
3.78 · 70 ratings
length-novella · futuristic · m-m · science fiction · queer · shapeshifters · fated-mates · aliens · military · fantasy · paranormal · alpha male · magic · royalty · queer-awakening · war · abuse · friends to lovers
All books in this series ❯
Sponsored links
Starfighter
by Hamlet Machine
4.21 · 33 ratings
length-novella · aliens · science fiction · queer · m-m · futuristic · military · dark · from hate to love · fantasy · paranormal · mystery · vampires · dystopian · war
All books in this series ❯
Alien Barbarians of Zandipor
by Kim Fox
3.67 · 29 ratings
military · science fiction · length-novella · humor · aliens · futuristic · alpha male · sassy heroine · explicit-open-door · possessive hero · insta-love
All books in this series ❯
Starwalkers
by Julia Crane
4.35 · 20 ratings
science fiction · aliens · length-novella · futuristic · young adult · military · dystopian · urban fantasy · magic · legends & fairy tales · contemporary
All books in this series ❯
Encounters
by Ann Somerville
3.54 · 13 ratings
m-m · futuristic · fantasy · science fiction · queer · length-novella · erotica · contemporary · length-short · paranormal
All books in this series ❯
Alien Lovers
by Orion Blaze
3.47 · 17 ratings
science fiction · multicultural · queer · m-m · length-novella · futuristic · queer-awakening · aliens · non-human-hero
All books in this series ❯
Daughters of Lyra
by Felicity Heaton
4.00 · 20 ratings
science fiction · length-novella · futuristic · m-f · military · mature couple · paranormal · fantasy · vampires
All books in this series ❯
Protectors
by Nana Malone
3.63 · 16 ratings
fantasy · contemporary · audiobook · futuristic · science fiction · superheroes · young adult · length-medium · paranormal · length-novella · military · multicultural · anthologies · suspense
All books in this series ❯
Outlaw MC
by James Cox
3.86 · 22 ratings
m-m · science fiction · queer · length-novella · futuristic · bikers · menage · erotica · bdsm · friends to lovers · multicultural
All books in this series ❯
Olympia Alien Mail Order Brides
by K. Cantrell
3.10 · 10 ratings
length-novella · military · futuristic · science fiction · aliens · competent heroine · pregnancy · explicit-open-door · arranged marriage · non-human-hero · insta-love · himbo · m-f · contemporary · independent heroine · small town · sunny hero · explicit-plentiful · working class heroine · humor
All books in this series ❯
Omega Awakening
by Aiden Bates
3.46 · 13 ratings
demons · paranormal · fantasy · angels · witches · shapeshifters · m-m · vampires · psychics · queer · omegaverse · futuristic · science fiction · length-novella · contemporary · bondage · erotica · bdsm · breeding · length-short
All books in this series ❯
Ylendrian Empire
by Reesa Herberth
3.73 · 11 ratings
science fiction · futuristic · length-novella · suspense · length-medium · queer · m-m · hurt-comfort · poly · erotica · military · m-m-f · mystery · fantasy · bisexual
All books in this series ❯
Spandex and Superpowers
by Charles Payseur
3.44 · 9 ratings
contemporary · m-m · humor · fantasy · science fiction · queer · superheroes · length-novella · futuristic · christmas · paranormal · shapeshifters · multicultural · urban fantasy
All books in this series ❯
A Place of Refuge
by Victoria Janssen
3.50 · 6 ratings
science fiction · queer · f-f · length-novella · military · futuristic · black-mc · multicultural · behind-doors · f-f-f · fantasy · independent heroine · gifted heroine · war · cheerful heroine · competent heroine · menage · open-door
All books in this series ❯
Inmate Space Mates
by Ava Castle
3.25 · 4 ratings
futuristic · fantasy · science fiction · military · multicultural · length-novella · shapeshifters · paranormal
All books in this series ❯
Intergalactic Mates
by Zara Harris
4.00 · 5 ratings
science fiction · multicultural · length-novella · futuristic · military · aliens · dystopian · fantasy
All books in this series ❯
The Department of Homeworld Security
by Cassandra Chandler
3.38 · 8 ratings All books in this series ❯Alien Tigers
by Tanya Jolie
3.00 · 3 ratings
psychics · science fiction · aliens · military · length-novella · futuristic · demons · witches · angels · shapeshifters
All books in this series ❯