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.

The Defectors

Free
Science Fiction
4.2★ 500+ ratings

On her mission to rescue her best friend Greyson, twenty-year-old Haven Allis will discover a revolution in motion and be forced to question everything she believes.


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Victim Zero

Free
Science Fiction, Action
4.4★ 1000+ ratings

The plague was born from hope, meant to change the world. But when the world ended, the weight of its dead fell on the shoulders of the man at the heart of it all. For Kell, survival is not enough.


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Outback Outbreak

Free
Horror, Science Fiction, Suspense
4.2★ 1000+ ratings

The outbreak changed everything, but there are some bonds even the undead can’t break. It’s been years since Pete Guinn last saw his sister and now she’s back.


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The Fall of Man

Free
Science Fiction, Action
4.3★ 100+ ratings

After the bombs fell and the old world passed away, two sides emerged from the destruction. As tensions mount and blood begins to flow, friends become enemies, and allegiances to melt away.


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The Chameleon

Free
Horror, Supernatural
4.3★ 100+ ratings

When a series of appalling murders leads the local sheriff to conclude that the perpetrator may not reside in the mortal realm, he recruits a horror novelist to offer insight into the investigation.


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Colony One

Free
Science Fiction, Adventure
4.1★ 1000+ ratings

At a glance, Elderon seems to be a utopia. As Maggie realizes that Elderon is not what it seems, she’ll go undercover and learn a truth that could put her life in jeopardy.


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The Hunted

Free
Science Fiction, Thriller
4.2★ 1000+ ratings

Joule and Cage Mazur feel like prisoners in their home. With monsters stalking the streets, their family’s only protection is bolting the door tight and hoping the locks hold.


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Flicker

Free
Science Fiction, Suspense
4.2★ 750+ ratings

To Earthen tourists, Ember is a strange and unusually talented future-teller who likes solitude. To her people, Ember is rebellious and doesn’t belong. She sees the future, and the empire knows it.


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Star Mage Quest

Free
Science Fiction, Adventure
4.2★ 500+ ratings

Carina Lin is a slum brat turned space mercenary with a twist. She’s also a mage, and she’s about to risk everything. Her merc band accepts what is surely a suicide mission.


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Scythian Dawn

Free
Science Fiction, Adventure
4.4★ 500+ ratings

Alien overlords keep Earth trapped in a perpetual Dark Age. One barbarian war band has the will to fight back.

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The Kaiyos Lex: Imperium

Free
Science Fiction, Teen
4.5★ 300+ ratings

Betrayed by his leaders and sent to die defending a distant planet, Praetor Gaius Aurelius Marcellus finds his most ruthless adversaries are not a bunch of genocidal aliens.


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Angie and the Farmer

Free
Romance, Science Fiction, Historical
4.2★ 500+ ratings

How did an iPhone sold in Missouri in 2014 wind up in a grave in Oregon that had been undisturbed for over ninety years? How can Angie convince Jed that she is telling the truth?


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Knot in Time

Free
Science Fiction, Adventure
4.2★ 500+ ratings

I work for a group called the Keepers, the custodians of time. Time is a mess, and it needs all the custodians it can get. That is why the Keepers selected me, a nineteen-year-old high school dropout.


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Broken Realms

Free
Science Fiction, Adventure
4.1★ 400+ ratings

Some lives are bigger than one reality. The day Mara Lantern meets herself, her life gets bigger. And when she meets her brother from an alternate universe, it becomes more complicated.


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Project Mind River

Free
Science Fiction, Action
4.3★ 100+ ratings

Tara invented a sentient AI, but it was lost in a fire. Now, accidental deaths are happening throughout the country. She needs to find out what’s happening before it’s too late.

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The Stars Beyond the Mesa

Free
Science Fiction, Adventure
4.1★ 100+ ratings

In Northern Arizona is a research facility that never opens its doors. Stranded there for the summer with her family, sixteen-year-old Katy is planning her escape. Then the incident happens.


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