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.

Leviticus

Free
Science Fiction, Adventure
4.2★ 75+ ratings

Leviticus is a gifted engineer, part of a team of graduate students who have developed a powerful new technology. He will play a pivotal role in the coming cataclysm.

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The Network

Free
Science Fiction, Action
4.4★ 500+ ratings

Detective Constable Sean McMillan finds himself pitting his wits against his ever more resourceful and powerful enemies. It is only a matter of time before an inevitable showdown and only one will win.

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Clouds of Venus

Free
Science Fiction, Adventure
4.0★ 1000+ ratings

Dale Kinmont is a college student in post-catastrophe America. He’s lucky; he lives in one of the walled cities for the nation’s elite. Life is pleasant until he’s framed for murder.


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Quantum Cheeseburger

Free
Science Fiction, Adventure
4.3★ 100+ ratings

Driving his vintage Jeep down a lonely highway in the New Mexico desert, Chris, an ordinary guy with a horrible boss, makes a terrible mistake. Now military, mercenaries, and aliens are hunting him.

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Symbiosis

Free
Science Fiction
4.0★ 1000+ ratings

Pursuing an escaped alien, Justice Keeper Anna Lenai discovers her ancestors’ lost homeworld.

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The Kalis Experiments

Free
Science Fiction, Adventure
4.1★ 100+ ratings

Syrina, a Kalis master of disguise, embarks on a perilous mission in the steam-powered city of Fom where she learns of a machine that could end civilization a second time.


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Oblivion Threshold

Free
Science Fiction, Adventure
4.2★ 1000+ ratings

It isn’t a war—it’s a massacre. Mindless mechanical aliens are destroying everything in their path. And their path is heading straight for Earth.

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Chaos Zone

Free
Science Fiction
4.2★ 100+ ratings

When Sloane sets her sights on a bounty with a reward that will solve her problems, the Commander of the Galactic Fleet shows up in pursuit of the same man. Tangled in a web of galactic politics, she won’t let her prize go.

Amazon

Port State

Free
Science Fiction, Novella
4.1★ 100+ ratings

When it comes to a sufficiently advanced technology, we are so conditioned by what we see at the movies that the real thing no longer seems magical. And unfortunately, that’s exactly what happens.


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Maelstorm

Free
Science Fiction, Adventure
4.1★ 500+ ratings

A hundred years from now, when selection day comes around, Gideon Rayne is entrusted with a miraculous suit of high-tech armor and put on a collision course with forces darker than he never knew existed.

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Gunslinger to the Stars

Free
Science Fiction, Action
4.2★ 400+ ratings

The name’s Sam Kletchka. Perhaps you’ve heard of me: captain of the Star Runner, military contractor for Earthfleet, and interstellar privateer. But before all that, I was a freelance gun for hire.


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Archangel Down

Free
Science Fiction
4.1★ 2500+ ratings

A military officer from the colonies and a civilian from Old Earth, they couldn’t have less in common. But they have to work together to save the lives of millions–and their own.


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Dawn of Rebellion

Free
Science Fiction, Teen
4.2★ 200+ ratings

Criminals are sent to the colonies to work as slaves. It’s a savage place, especially for a teenage girl from the wrong side of London. They’ve taken Dawn Nolan’s sister. She might die trying, but Dawn is going to get her back.

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Space Colony One: Books 1-3

Free
Science Fiction
4.3★ 2500+ ratings

A new planet is not the paradise the scientists predicted. With alien predators lurking and stowaway saboteurs, Ethan must fight to preserve the last hope of humankind.


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Blackwing

Free
Science Fiction
4.2★ 200+ ratings

Is Socrates Blackwing’s magic stronger than the technology of 2070? And what will this wizard, warrior, and bounty hunter do when confronted with one of his own kind?

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The Change

Free
Science Fiction, Romance
4.1★ 1000+ ratings

Everything depends on Candice. Is she strong enough to rescue her childhood sweetheart from the games? The competition is fierce, and even the winners end up damaged. The apocalypse made sure of that.


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