Aliens are extraterrestrial life that does not originate from Earth. The sentient beings can range from simple bacteria-life organisms to complex species and individuals. Aliens are used in a variety of genres, most notably Science-Fiction.

United (Alienated, #3)
Defy the Dawn (Midnight Breed, #14)
Unknown (Unknown #1)
Loving Deviant (Cyborg Seduction, #9)
Pirate (Space Gypsy Chronicles, #1)
Rendan (Dragons of Preor, #4)
Descended (Alien Mate Index, #3)
Saven Defiance (Saven #3)
Finn (Hell Squad, #10)
Warriors’ Providence (Cadi Warriors, #2)
Life Debt (Star Wars: Aftermath, #2)
Illusion Town (Ghost Hunters, #13)
Arabella of Mars
Moon Girl and Devil Dinosaur, Vol. 1: BFF
Flying (Flying #1)
The 5th Wave (The 5th Wave, #1)
Cress (The Lunar Chronicles, #3)
The Infinite Sea (The 5th Wave, #2)
The Last Star (The 5th Wave, #3)
Onyx (Lux, #2)
The Atlantis Gene (The Origin Mystery, #1)
Sleeping Giants (Themis Files, #1)
Obsidian (Lux, #1)
Binti (Binti, #1)
United as One (Lorien Legacies, #7)
Opal (Lux, #3)
Ancillary Justice (Imperial Radch, #1)
Fortunately, the Milk
Children of Time
Ral's Woman by Laurann DohnerGrim by M.K. EidemClaimed by Evangeline AndersonHunted by Evangeline AndersonBerrr's Vow by Laurann Dohner
Mars Needs Women Trope
399 books — 487 voters

Moon 514 by Drew BrineyThe One by J.K. AccinniUntamed by Madeline DyerAlien Species Intervention by J.K. AccinniEvil Among Us by J.K. Accinni
Young Adult Sci-Fi
137 books — 42 voters

The Orphan Trilogy by James MorcanThe Orphan Conspiracies by James MorcanGENIUS INTELLIGENCE by James MorcanAngels & Demons by Dan BrownThe Da Vinci Code by Dan Brown
Underground Knowledge
734 books — 193 voters

Obsidian (Lux, #1)
The 5th Wave (The 5th Wave, #1)
The Host (The Host, #1)
Onyx (Lux, #2)
Opal (Lux, #3)
Origin (Lux, #4)
I Am Number Four (Lorien Legacies, #1)
The Infinite Sea (The 5th Wave, #2)
Alienated (Alienated, #1)
Shadows (Lux, #0.5)
Ender's Game (Ender's Saga, #1)
The Power of Six (Lorien Legacies, #2)
The Rise of Nine (Lorien Legacies, #3)
These Broken Stars (Starbound, #1)

Gini Koch
Do I really run like that?" (Kitty) "Yup," Martini confirmed. "Don't worry, I think it's sexy." "Thank God. I think I look like a cheetah on drugs.
Gini Koch, Touched by an Alien

Darynda Jones
Ambulances were cool. “You just want to fondle my extraneous body parts,” I said to the EMT as I picked up a silver gadget that looked disturbingly like an alien orifice probe, broke it, then promptly put it back, hoping it wouldn’t leave someone’s life hanging in the balance because the EMT couldn’t alien-probe his orifices.
Darynda Jones, First Grave on the Right

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