Top Free Science Fiction Kindle Books

Whether you enjoy futuristic, dystopian, apocalyptic, space opera, or other sci-fi delights, you’ll find great books among our top 200 free Kindle science fiction books.

Steel Guardian

Free
Science Fiction
4.4★ 1000+ ratings

Machines turn against humans and the AI Uprising destroys society. When CleanerBot Block discovers a human infant, his surprise attachment to the girl compels him to protect her.


Amazon

Paax

Free
Steamy Romance, Science Fiction
4.0★ 2000+ ratings

The situation is dangerous for a hardened warrior, let alone a soft Human female without fangs or claws to defend herself. Sending her back to Earth is the only choice.

Amazon

Compound 26

Free
Science Fiction, Suspense
4.6★ 1000+ ratings

In a society ruled by sanctions and curfews, Dr. Meghan Forester emerges as the youngest and most promising scientist to join the fight against Makanza—the deadly virus that’s ravaged the world.


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The Watchers of Eden

Free
Science Fiction, Teen
4.5★ 1000+ ratings

On the day of the Duty Call, Cyra’s world turns upside down when she is assigned to Eden. Away from everything she knows, Cyra discovers she has a special power.

Amazon

The Undoing

Free
Science Fiction, Teen
4.4★ 75+ ratings

In a chilling near-future world, a totalitarian regime ruthlessly controls every aspect of citizens’ lives. But when Rebecca’s brother dies from a virus sweeping the city, she inherits a deadly secret.


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Lying in Ruins

Free
Romance, Science Fiction
4.2★ 100+ ratings

After society’s collapse, when Charity’s path crosses with a notorious mercenary group, she is faced with a less than stellar choice – join the sexy Ruin in a mockery of teamwork or waste her valuable time shaking him loose.


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The Superhero’s Return

Free
Science Fiction, Adventure
4.3★ 50+ ratings

Eighteen-year-old Kevin Jason (Bolt) wants respect. But respect from his fellow superheroes becomes the last thing on his mind, however, when an infamous serial killer makes him his next target.


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Autumn: Dawn

Free
Science Fiction, Horror
4.3★ 300+ ratings

A group of survivors is trapped in the rotting heart of London, hopelessly outnumbered. There are rumors of a safe haven to the north, but they’ll going to need an army to get away from this place.


Amazon

The Book of Jared

Free
Science Fiction, Action
4.6★ 50+ ratings

As the Earth self-destructs, Jared’s only hope for survival is the Sanctuary, an underground city carved from the tunnels of Poland’s salt mines. But can he escape fellow survivors?


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Taken

Free
Steamy Romance, Science Fiction
4.3★ 1000+ ratings

Jayne is a feisty human lawyer plucked from Earth by a beast of an alien captor, Rexitor. “All enemies of the Empire must die. But not her, she is mine to claim…”


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Between Mountain and Sea

Free
Science Fiction, Adventure
4.4★ 1000+ ratings

A descendant of one of the Founding Families who left a dying Earth and now rule New Eden, Mei will discover secrets that will forever change her own destiny.


Amazon

Phantom Echo

Free
Thriller, Science Fiction
4.1★ 300+ ratings

Detective Nathan Miller suspects something sinister when the body of a college student is dumped in an alley far from campus. He’s forced to use allies who might be enemies.


Amazon

The Ancient Gate

Free
Science Fiction
4.0★ 50+ ratings

Desa and Anna must leave their comfortable lives to embark on a journey across dimensions where the two will face an enemy that threatens to destroy both of their worlds.


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Rescued by Qaiyaan

Free
Steamy Romance, Science Fiction
4.2★ 1000+ ratings

When a beautiful human female is rescued from cryogenic slumber, she awakens primal urges in Qaiyaan’s soul. He begins to suspect that Lisa carries a secret that could change the fate of his people forever.


Amazon

Dragon’s Covenant

Free
Science Fiction, Adventure
4.3★ 300+ ratings

The Warlord has always eluded him, so when Talon Rift learns that the Warlord might have help from inside the Alliance government, he vows that he will stop at nothing to bring them to justice.


Amazon

Sundown Apocalypse

Free
Science Fiction, Action
4.0★ 100+ ratings

The end of days is at hand. Terrorist organizations have taken out all superpowers, cleansing the planet of the ‘disease of civilization’. Small bands of survivors fight back in the only way they can.


Amazon