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 100 free Kindle science fiction books.

The Navigator

Free
Science Fiction, Action
4.3★ 1000+ ratings

Earth has changed. The world collapsed after the meteor impacts when fire rained down from the skies, instantly vaporizing millions. The survivors are facing a new problem.


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Wild Child

Free
Science Fiction, Suspense
4.1★ 500+ ratings

When Briana challenges Kyle to a swim, she’s injured in a horrific accident, but she discovers a mysterious drug-like substance in an underwater cave that saves her life.


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One If

Free
Science Fiction, Teen
4.2★ 100+ ratings

When Parker Kittredge slips and plunges 18 stories to the street, she awakens on a completely different planet, one destroyed by climate change and locked in a civil war.


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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.


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The Ancient Gate

Free
Science Fiction
3.9★ 10+ 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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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.


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28 Days

Free
Science Fiction
3.8★ 40+ ratings

Emma Cartwright races against time to find work in a society where compliance is mandatory and freedom is scarce. When her son Jack is arrested, Emma has to take drastic measures.


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Given

Free
Steamy Romance, Science Fiction
4.3★ 1000+ ratings

Davien will do whatever it takes to get back into space. The last thing he needs is a smart-mouthed and sexy thief whose scent drives him wild.

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Oblivion’s Cloak

Free
Science Fiction, Action
4.3★ 100+ ratings

A shadowy new faction is looking for Earth’s last survivor. They are a mystery to everyone but Shaara. Hard as she’s tried to forget, she knows them all too well. Which means she’s the only one who can stop them.


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Longshot

Free
Science Fiction
3.8★ 500+ ratings

What’s John to do when the winning streak he’s only ever dreamed about hits just as aliens invade and it looks like the world is coming to an end?

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Dusk of Humanity

Free
Science Fiction, Suspense
4.4★ 200+ ratings

Dr. Egan never thought life after the apocalypse would be so dull. Until the day she finds an infected man in her operating room with symptoms she’s never seen before. And it’s spreading.


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Peyton 313

Free
Science Fiction, Suspense
4.3★ 1000+ ratings

Her cybernetic studies in genetic engineering were supposed to make the world better and Dr. Kyra Winters certainly never meant for her work to be used for anything evil.

Amazon

Mutation

Free
Science Fiction, Action
4.5★ 400+ ratings

Mutation is the first book in a fast-moving, action-filled series that turns the zombie apocalypse on its head. If you like thrilling, original sci-fi, you’ll love Mutation.

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Three Aliens Walk Into A Bar

Free
Science Fiction, Humor
3.9★ 75+ ratings

Lake Peculiar, Minnesota, is a small town that has weathered its share of disasters before and is sure the alien invasion won’t mean anything to them… until three aliens arrive in the center of town.


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Midnight Wings

Free
Science Fiction, Adventure
4.3★ 500+ ratings

In El’s fantasies, she pilots a fighter jet for the intergalactic fleet. In reality, she’s a mechanic whose social ranking keeps her as hired help to her stepmother. An exciting science fiction retelling of Cinderella.

Amazon

Bottle Born Blues

Free
Science Fiction
3.8★ 30+ ratings

An artificial life form has knowledge of a plot to overthrow the government, making him a target for both the plotters and the security forces. He will have to take desperate measures to save those he loves.

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