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.

Betrayal

Free
Science Fiction, Adventure
4.2★ 2000+ ratings

Captain Shepperd is about to learn that you can’t hide from the sins of your past, especially when the priceless synthetic stowaway on his ship is programmed to kill.


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The Necklace: The Dusky Club, June 1962

Free
Romance, Science Fiction
4.2★ 300+ ratings

What if you could travel back into the past to meet the man of your dreams? When Susan does just that, she will learn something important about James and about herself.

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Earthbound

Free
Science Fiction, Historical
4.2★ 300+ ratings

Marooned in the 19th century US West, an alien must survive and return to his homeworld to destroy his mortal enemies and avenge his people.


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Quantum Incident

Free
Science Fiction, Novella
4.3★ 1000+ ratings

The long sought Higgs boson has been discovered at the Large Hadron Collider in Geneva. Scientists rejoice in the confirmation of quantum theory, but a reporter believes they may be hiding something.


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The Emperor’s Edge

Free
Science Fiction, Epic Fantasy
4.4★ 2500+ ratings

The empire’s most notorious assassin is in town and Imperial law enforcer Amaranthe Lokdon’s superiors order her to hunt him down. Either they have an unprecedented belief in her skills… or someone wants her dead.

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Armstrong Station

Free
Science Fiction, Adventure
4.1★ 300+ ratings

When Dr. Melanie Destin’s life takes a wild, unexpected turn at the busiest spaceport in the Solar System, she finds herself embroiled in a deadly conflict.

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The Institute

Free
Science Fiction, Teen
4.3★ 2000+ ratings

Allira must keep her Defective brother safe from the Institute. Will they discover his ability to predict the future?

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The Alpha Plague

Free
Science Fiction, Suspense
4.0★ 2500+ ratings

Do you have a plan for the apocalypse? Rhys doesn’t. But as he watches chaos spill from the Alpha tower, he knows one thing. He must get to his son before the virus does.


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Residual Belligerence

Free
Science Fiction, Adventure
4.2★ 500+ ratings

Zach Hilyer is in trouble. He is good, one of the top field operatives in the infamous Thieves’ Guild. Problem is, he can’t remember when it all went wrong.

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Aura

Free
Science Fiction, Teen
4.4★ 100+ ratings

In a world where your thoughts don’t belong to you, the person who controls the mind will rule everything. Welcome to The Society.


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Miltan Epsilon

Free
Science Fiction
4.2★ 50+ ratings

Jazz Healy finds herself befriending stowaways, fighting off tech cultists, and hunting down an assassin, all while bonding with a gene-splice kitten and endeavoring to keep her criminal kingpin mother at arm’s length.

Amazon

The Thought Readers

Free
Science Fiction
4.2★ 2500+ ratings

Everyone thinks I’m a genius. I finished Harvard at eighteen and now make crazy money at a hedge fund. But that’s not because I’m unusually smart or hard-working. It’s because I cheat.


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Silent Order: Iron Hand

Free
Science Fiction, Adventure
4.3★ 1000+ ratings

Jack March is an operative of the most efficient and feared intelligence organization in human space. A mission leads March to a lawless space station, where he might be the only one left to fight.

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Monster of the Dark

Free
Science Fiction, Action
4.2★ 100+ ratings

Carmen Grey is taken to an underground facility for Clairvoyants, stripped of her name and identity, and fashioned into something lethal. Yet her ultimate battle won’t be to save her life but to keep her soul.


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Onslaught

Free
Science Fiction
4.1★ 300+ ratings

When mutants from civilization’s end come roaring back from exile, telepath Langston Wheeler must confront assassination, interstellar intrigue, and a woman he can’t resist.


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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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