The Underground: Similar series
Confederation of Valor
by Tanya Huff
4.09 · 152 ratings
strong heroine · aliens · science fiction · war · futuristic · military · survival · humor · paranormal · length-medium · fantasy · queer · time travel · length-long · mystery · pirates · m-f · suspense
All books in this series ❯
Metahuman Files: Classified
by Hailey Turner
4.19 · 37 ratings
suspense · superheroes · dystopian · paranormal · third-person-pov · fetish · male-pov · m-m · length-novella · men in uniform · dual-pov · anal sex · science fiction · explicit-open-door · futuristic · military · queer · tortured hero · height-difference · north-america
All books in this series ❯
The Thresl Chronicles
by Amber Kell
3.78 · 70 ratings
science fiction · shapeshifters · m-m · futuristic · queer · length-novella · aliens · fated-mates · military · paranormal · magic · fantasy · alpha male · royalty · abuse · war · friends to lovers · queer-awakening
All books in this series ❯
Sponsored links
Warriors of Kaizon
by Luna Hunter
3.72 · 67 ratings
length-novella · shapeshifters · military · humor · futuristic · aliens · science fiction · alpha male · royalty · non-human-hero · dystopian · possessive hero · paranormal · insta-love · virgin heroine · erotica · breeding · fantasy · fighters · from hate to love
All books in this series ❯
Starfighter
by Hamlet Machine
4.21 · 33 ratings
aliens · length-novella · queer · futuristic · m-m · science fiction · dark · military · from hate to love · fantasy · war · paranormal · vampires · mystery · dystopian
All books in this series ❯
Blue Solace
by C.W. Gray
4.19 · 69 ratings
science fiction · m-m · queer · length-short · futuristic · aliens · omegaverse · fated-mates · military · abuse · paranormal · fantasy · erotica · humor · length-medium · third-person-pov · shy-hero · friends to lovers · explicit-open-door · dark
All books in this series ❯
Interstellar Brides: Ascension Saga
by Grace Goodwin
4.30 · 112 ratings
military · aliens · science fiction · futuristic · multicultural · length-novella · fated-mates · aristocratic heroine · non-human-hero · mystery · strong heroine · explicit-open-door · possessive hero · gifted heroine · spanking · praise-kink · m-f · sassy heroine · suspense · non-human-heroine
All books in this series ❯
Men of Omaron
by Juno Wells
4.01 · 31 ratings
science fiction · futuristic · military · fantasy · length-novella · aliens · length-short · alpha male · m-f · pregnancy · dual-pov · royalty · third-person-pov · explicit-open-door
All books in this series ❯
Accidental Alien
by Erin Tate
4.01 · 39 ratings
futuristic · humor · military · science fiction · aliens · length-novella · political-intrigue · erotica · length-medium
All books in this series ❯
Taken by the Panther
by V.M. Black
4.26 · 23 ratings
military · multicultural · fantasy · length-novella · futuristic · shapeshifters · paranormal · science fiction · urban fantasy · witches · curvy heroine · psychics
All books in this series ❯
Timber Bear Ranch
by Scarlett Grove
4.41 · 22 ratings
military · fantasy · shapeshifters · psychics · paranormal · futuristic · science fiction · multicultural · length-novella · suspense · fated-mates · m-f
All books in this series ❯
The Interscission Project
by Arshad Ahsanuddin
4.22 · 9 ratings
futuristic · military · science fiction · time travel · queer · m-m · m-f · paranormal · length-medium · length-short · fantasy · mystery
All books in this series ❯
Alien Warrior Brides
by Taylor Neptune
3.73 · 15 ratings
military · futuristic · new adult · science fiction · aliens · multicultural · humor · length-novella · length-short
All books in this series ❯
A Place of Refuge
by Victoria Janssen
3.50 · 6 ratings
length-novella · f-f · science fiction · queer · military · futuristic · black-mc · behind-doors · multicultural · gifted heroine · menage · competent heroine · cheerful heroine · f-f-f · open-door · fantasy · war · independent heroine
All books in this series ❯
Kidnapped by Surtu
by Lisa Lace
4.00 · 4 ratings
length-novella · military · multicultural · science fiction · futuristic · aliens · erotica · length-epic
All books in this series ❯
Psions of SPIRE
by Alex Silver
4.40 · 5 ratings
m-m · queer · science fiction · urban fantasy · fantasy · futuristic · length-novella · poly · length-long · length-medium · new adult · paranormal
All books in this series ❯