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.

The Darkest Star (Origin, #1)
Saga, Vol. 9
Willa's Beast (Icehome, #3)
The Bones Beneath My Skin
Rejoice, A Knife to the Heart
Alpha Breeds (Alpha Horde, #1)
York (The Vorge Crew, #3)
Embrace the Passion (Pets in Space Anthologies, #3)
Tribe Protector (Chosen, #3)
The Serpent's Mate (Iriduan Test Subjects #3)
Expeditions, Estimation, and Other Dangerous Pastimes (Claimings, #4)
Ascension: 1 (Interstellar Brides: Ascension Saga #1)
Unleashed: Valos of Sonhadra
Vrehx (Conquered World, #1)
Skyward (Skyward, #1)
An Absolutely Remarkable Thing
The Darkest Star (Origin, #1)
Binti (Binti, #1)
House of Royale (Secret Keepers #4)
Blind Fall (Stolen by an Alien, #5)
Sleeping Giants (Themis Files, #1)
House of Darken (Secret Keepers, #1)
We Are Legion - We Are Bob (Bobiverse, #1)
Only Human (Themis Files, #3)
Argan (Dragons of Preor, #10)
House of Leights (Secret Keepers, #3)
All These Worlds (Bobiverse, #3)
Fortunately, the Milk
A Closed and Common Orbit (Wayfarers, #2)
Obsidian (Lux, #1)
Onyx (Lux, #2)
The 5th Wave (The 5th Wave, #1)
The Host (The Host, #1)
Opal (Lux, #3)
Origin (Lux, #4)
I Am Number Four (Lorien Legacies, #1)
Opposition (Lux, #5)
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)

Related Genres

Philip K. Dick
Well, I hate to admit it, but it is possible that there is (one) such a thing as telepathy and (two) that the CETI project's idea that we might communicate with extraterrestrial beings via telepathy is possibly a reasonable idea--if telepathy exists and if ETIs exist. Otherwise we are trying to communicate with someone who doesn't exist with a system which doesn't work.
Philip K. Dick, The Dark-Haired Girl

Shaun David Hutchinson
I could write my name across the sky, and it would be in invisible ink.
Shaun David Hutchinson, We Are the Ants

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