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 Blind Spot

Free
Science Fiction, Action
4.2★ 400+ ratings

With the best hacker in the city on her side, Marcie gets to work… To avoid total annihilation, she will have to betray everyone she loves, starting with her father… And even then, her chances of success are slim.

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Displaced

FEATURED FREE BOOK
Science Fiction, Teen
4.3★ 100+ ratings

When Bea Cooper is unexpectedly transported to another place and time, it will take everything in her power to find a way back home, especially with an evil adversary trying to stop her from ever returning.

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Frontier Justice – The Survivalist

Free
Science Fiction, Action
4.3★ 7500+ ratings

The Superpox-99 virus has wiped out nearly the entire human race. To stay alive, U.S. Deputy Marshal Mason Raines must forage for food, water, and gasoline while outgunning opportunists.


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Adopted by Aliens

Free
Science Fiction, Teen
4.0★ 500+ ratings

One million years in the future, young human Antaska thinks that she’s applying for a job working for aliens in outer space. Unknown to her, the gigantic green aliens want earthlings as pets.


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Quantum Tangle

Free
Science Fiction, Adventure
4.3★ 2500+ ratings

Dropping out of sub-space into the wrong galactic sector, Seth Kada wakes up with a headache and an extraordinary alien aboard his ship.


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ARISEN: Last Stand

Free
Science Fiction, Action
4.6★ 750+ ratings

One platoon of legendary Rangers. An isolated combat outpost in the Spin Ghar mountains. 150 Taliban survivors armed with Tier-1 weapons. And all the rampaging dead guys in central Asia.


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Lake of Sins: Escape

Free
Science Fiction, Teen
4.2★ 1000+ ratings

Every year after harvest, the weakest are removed from the encampment. None of them are ever seen or heard from again. Trinity escapes into the forest, but she’s hunted from land and sea by predators.


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Sub-Human

Free
Science Fiction, Action
4.1★ 2500+ ratings

When World War III strikes, Dr. Craig Emilson is sent to take out a powerful AI. He becomes the greatest hope for humanity. He must choose between himself or all mankind.


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Altered Genes

Free
Thriller, Science Fiction
4.4★ 1000+ ratings

After Professor Simmons learns of a genetic threat unlike anything the world has ever seen, he, Dr. Ling, and an odd group of survivors find themselves on the run as civilization collapses around them.


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Mind Secrets

Free
Science Fiction, Teen
4.2★ 500+ ratings

Waking up being hunted, Michael finds sanctuary with a group of telepaths who sense thoughts and emotions. To save his friends, he must confront his forgotten secrets.


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Broken Skies

Free
Science Fiction, Teen
4.2★ 1000+ ratings

Jax will do anything to save her twin . . . even team up with a teenage alien left behind by the same ship that took her brother. She agrees to work with the alien, but it isn’t that easy.

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Into the Dark

Free
Science Fiction, Adventure
4.3★ 200+ ratings

This dark universe offers a game of cat and mouse through the galaxy with twists and turns at every solar system. Lost alien civilizations, six-limbed insectoid warriors, plasma rifles, and more!

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Skyline

Free
Science Fiction, Teen
4.3★ 10+ ratings

Aurelie Bay and her family are loyal to Skyline and the corporation that has saved humanity from the apocalypse. Skyline is home. Skyline is family. Home is where the heart is. Until it isn’t.


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The Legacy Human

Free
Science Fiction, Action
4.2★ 1000+ ratings

Elijah Brighton wants to become an ascender. But he is a legacy human, preserved and cherished for his unaltered genetic code. Soon, the ascenders and the legacies they keep start to unravel.


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Ash

Free
Science Fiction, Novella
4.3★ 500+ ratings

Facing the zombie apocalypse in a wheelchair might prove a challenge to others. For thirteen-year-old Ash, it’s just another fight for her life.


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Rath’s Deception

Free
Science Fiction, Suspense
4.4★ 1000+ ratings

On the cut-throat streets of Tarkis, orphaned teens like Rath end up jailed … or dead. So when the shadowy Janus Group offers Rath a chance to earn riches beyond his wildest dreams, he seizes it.


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