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 Rare

Free
Science Fiction
4.8★ 20+ ratings

Olivia hates being different. But when she starts exploring the world, she realizes everything she thought she knew was a lie.

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Wings of Earth – Scatter the Winds

Free
Science Fiction, Adventure
4.1★ 300+ ratings

On the Run and Betrayed, Kylla Torrance leads a mission to establish a sanctuary where genetically engineered Augments can live in peace, beyond the reach of the Shan Takhu Institute.


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Invincible

Free
Science Fiction, Suspense
4.4★ 200+ ratings

Ryan’s not like other people. He has a genetic variant that slows aging, regenerates cells, and makes him impervious to toxins. He carries within him a virtual miracle cure that could save lives.


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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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Into Twilight

Free
Science Fiction, Mystery
4.3★ 500+ ratings

Korea, 22nd Century. Surrender isn’t in Stefan Mendoza’s DNA. So when a traitor betrays his black-ops team, he alone pushes through the torture and escapes with revenge burning in his mind.


Amazon

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.

Amazon

Fang

Free
Steamy Romance, Science Fiction
4.2★ 400+ ratings

When vampire dentist Dr Fang (yes, really) gets invited to go to the Intergalactic Dating Agency’s speed dating event as his friend’s wingman, he can’t refuse.


Amazon

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.


Amazon

Sub-Human

Free
Science Fiction, Action
4.1★ 2000+ 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.


Amazon

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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Into the Dark

Free
Science Fiction, Adventure
4.2★ 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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October’s Gone

Free
Thriller, Science Fiction
3.8★ 400+ ratings

On October 15, Elizabeth Coombs wakes from one nightmare to another. There’s a freak storm, strange lights in the sky, sounds that don’t seem right, and something lurking outside her rental cabin.


Amazon

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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The Night Land

Free
Science Fiction
4.0★ 200+ ratings

The sun went out centuries ago. A vestige of mankind still clings to life, hidden from Earth’s frozen surface in an underground fortress, but this tenuous refuge is under siege.


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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.


Amazon

Wild Nines

Free
Science Fiction, Adventure
3.9★ 100+ ratings

Framed for murder on a fringe outpost, a ragtag mercenary crew must find the truth before bounty hunters take their lives. Davin has to find out what happened while outrunning merciless authorities.


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