Invasive Species

by Kelly Goode

4.50 · 2 ratings

military · science fiction · aliens · futuristic · length-short · standalone-first · first-in-series · cliffhanger

Invasive Species: Similar series

The Adventures of a Xeno-Archaeologist

by Jenny Schwartz

4.25 · 125 ratings

science fiction · aliens · futuristic · audiobook · military · length-short · angst · length-medium · fantasy · glimpses-kisses · cliffhanger · standalone-first · found-family · first-in-series · dual-pov · paranormal

All books in this series ❯

Interstellar Brides Program: Rogues

by Grace Goodwin

4.25 · 63 ratings

fighters · non-human-hero · military · first-person-pov · dual-pov · vampires · male-pov · futuristic · fated-mates · aliens · audiobook · m-f · alpha male · shapeshifters · height-difference · science fiction · explicit-open-door · graphic-violence · possessive hero · war

All books in this series ❯

An Uncommon Whore

by Belinda McBride

3.80 · 48 ratings

science fiction · futuristic · suspense · contemporary · m-m · abuse · queer · royalty · dark · military · slavery · length-short · aliens · anal sex · bodyguard-hero · commander · secret child · erotica · hurt-comfort · dual-pov

All books in this series ❯

Tribute Brides of the Drexian Warriors

by Tana Stone

4.15 · 159 ratings

aliens · science fiction · audiobook · military · futuristic · length-short · non-human-hero · m-f · length-medium · multicultural · abduction · first-in-series · south asian · standalone-first · insta-love · arranged marriage · explicit-open-door · shy heroine · pirates · fantasy

All books in this series ❯

Hell Squad

by Anna Hackett

4.18 · 300 ratings

science fiction · military · aliens · m-f · audiobook · dystopian · futuristic · independent heroine · length-short · length-novella · alpha male · cold heroine · explicit-open-door · commander · erotica · height-difference · war · cold hero · strong heroine · grumpy sunshine

All books in this series ❯

Xian Warriors

by Regine Abel

4.23 · 142 ratings

m-f · audiobook · science fiction · military · non-human-hero · aliens · humor · futuristic · multicultural · creative-anatomy · competent heroine · explicit-open-door · suspense · fated-mates · strong heroine · virgin hero · gifted heroine · war · length-medium · length-short

All books in this series ❯

The Phoenix Adventures

by Anna Hackett

4.08 · 174 ratings

science fiction · futuristic · m-f · military · length-short · aliens · fantasy · length-novella · paranormal · forced proximity · standalone-first · first-in-series · suspense · multicultural · dystopian · from hate to love · horror · dual-pov · third-person-pov · length-medium

All books in this series ❯

Chaos Station

by Kelly Jensen

4.24 · 76 ratings

military · m-m · queer · science fiction · length-short · futuristic · aliens · hurt-comfort · first-in-series · standalone-first · friends to lovers · explicit-open-door · length-medium · second chances · third-person-pov · paranormal · found-family · suspense · erotica · war

All books in this series ❯

Imperial Princes

by Mina Carter

3.65 · 38 ratings

futuristic · science fiction · length-short · aliens · first-in-series · rape · abuse · open-door · rape-mc · military · m-f · standalone-first · independent heroine · harems · working class heroine · sassy heroine · royalty · cold hero · suspense · explicit-open-door

All books in this series ❯

Alien Raiders' Brides

by Vi Voxley

4.14 · 33 ratings

futuristic · military · science fiction · length-short · alpha male · m-f · aliens · first-in-series · standalone-first

All books in this series ❯

The Ravager Chronicles

by Sara Page

3.80 · 24 ratings

reverse harem · aliens · length-short · poly · science fiction · multicultural · futuristic · military · demons · menage

All books in this series ❯

Men of Omaron

by Juno Wells

3.98 · 32 ratings

futuristic · science fiction · military · length-novella · length-short · aliens · fantasy · standalone-first · pregnancy · royalty · third-person-pov · explicit-open-door · dual-pov · first-in-series · alpha male · m-f

All books in this series ❯

Warlords of Octava

by Vi Voxley

4.00 · 24 ratings

science fiction · military · aliens · menage · futuristic · length-short · standalone-first · first-in-series · standalone

All books in this series ❯

Fire Planet Warriors

by Calista Skye

3.86 · 31 ratings

science fiction · aliens · length-short · futuristic · multicultural · humor · military · abduction · new adult · erotica · alpha male · standalone-first · m-f · first-in-series · curvy heroine

All books in this series ❯

Windwalkers

by Lisa Renee Jones

4.32 · 22 ratings

paranormal · suspense · fantasy · science fiction · m-f · futuristic · aliens · competent heroine · alpha male · independent heroine · length-short · male-pov · misogyny · mystery · second chances · tortured hero · dystopian · secret-relationship · strong heroine · grumpy sunshine

All books in this series ❯

The Intergalactic Union

by Natasha Campbell-Jones

3.53 · 19 ratings

early-20s-mmc · competent heroine · poly · betrayal · found-family · non-human-heroine · gifted heroine · m-m · torture-scs · science fiction · abuse · bisexual · royalty · rape-non-mc · queer · m-m-f · horror · male-pov · super rich hero · futuristic

All books in this series ❯

Ultimate Passage

by Elle Thorne

3.65 · 22 ratings

audiobook · military · multicultural · futuristic · science fiction · length-short · fantasy · aliens · paranormal · non-human-hero · standalone-first · erotica · first-in-series · urban fantasy · magic · length-novella · new adult · shapeshifters

All books in this series ❯

Shifters of Kladuu

by Pearl Foxx

4.00 · 13 ratings

futuristic · length-short · science fiction · aliens · military · standalone-first · first-in-series

All books in this series ❯

Warriors

by L.P. Peace

4.33 · 18 ratings

science fiction · fantasy · length-short · past-sexual-abuse · non-human-hero · military · reverse harem · futuristic · aliens · length-medium · breeding · praise-kink · possessive hero · war · cheerful heroine · anal sex · pregnancy · dark · explicit-open-door · insta-love

All books in this series ❯

Earth's Only Hope

by Joynell Schultz

4.25 · 8 ratings

science fiction · audiobook · dystopian · length-short · futuristic · aliens · military · first-in-series · cliffhanger · standalone-first · fantasy

All books in this series ❯

Half Light

by Alyssa Rose Ivy

4.57 · 7 ratings

young adult · futuristic · aliens · science fiction · length-short · military · standalone-first · time travel · first-in-series

All books in this series ❯

Galactic Storm

by Candice Gilmer

4.43 · 7 ratings

science fiction · military · length-short · futuristic · fantasy · aliens · standalone-first · first-in-series

All books in this series ❯

The Cambria Code

by S.M. Schmitz

4.00 · 4 ratings

futuristic · military · science fiction · aliens · length-short · standalone-first · first-in-series · length-novella

All books in this series ❯