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.

This Time

Free
Romance, Science Fiction, Historical
4.4★ 75+ ratings

After a drunk truck driver rear-ends her car, Madeline Archer awakes in 1892 and finds herself married to a stranger she thinks is the most interesting man she has ever met, but who seems to hate her.


Amazon

Invasion

Free
Science Fiction
4.0★ 100+ ratings

An invasion is what retired Marine Colby Edison calls it when his farm is overrun by alien plants. But Colby has skills other farmers lack on the newly terraformed agricultural world of Vasquez.


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Memoirs of a Time Traveler

Free
Science Fiction, Adventure
4.1★ 2500+ ratings

Archaeologist David Preston comes into possession of a baseball supposedly signed by the legendary Ty Cobb in 1908. Except the ball tests out to be an impossible paradox for alinear timeline.

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Dinosaur Wars: Earthfall

Free
Science Fiction, Action
4.1★ 500+ ratings

Wildlife biologist Chase Armstrong and rancher’s daughter Kit Daniels find themselves stuck in a battle between military forces and intelligent dinosaurs returning to Earth after 66 million years.


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First Strike

Free
Science Fiction, Adventure
4.0★ 200+ ratings

Half-man, half-machine, it’s taken Dale Simpson a long time to come to terms with the accident that almost killed him and the science experiment that saved his life instead.


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Time Trap

Free
Science Fiction, Adventure
4.2★ 1000+ ratings

Rayen awakens in an unfamiliar world and is captured then stuck in an institute for strange students while they search for her family. All she wants is to regain her memory and go home.


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Enemy Mine

Free
Fantasy, Novella
4.3★ 20+ ratings

Jessie Richter has kept her childhood secret safe and tucked away for over four long years, but she is caught Military Contractors who sense there is more to Jessie than meets the eye.

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Fallen

Free
Science Fiction, Adventure, Teen
4.0★ 100+ ratings

In this groundbreaking interactive fiction series, you are the main character. With the world around you teetering on the brink of collapse, you face a dire dilemma, torn in multiple directions and fearing the unknown.


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Free-Wrench

Free
Science Fiction, Action
4.4★ 1000+ ratings

Nita’s mother has lost her livelihood and perhaps soon her life to a terrible disease. Nita resolves to leave the safety of her home and do whatever it takes to find a cure.

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The Hidden Survivor

Free
Science Fiction, Action
4.1★ 1000+ ratings

An impending solar storm threatens the earth, but governing bodies have opted to keep that information close to the vest. Soon, the storm devastates the electrical grids and leaves the world in chaos.


Amazon

Wanted

Free
Science Fiction, Adventure
4.2★ 400+ ratings

Josh Gunn detests space pirates. He hunts them down and brings them to justice – one way or another. When he and his android partner Cherry Kang close in on one of the worst, the fireworks start.


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It Ain’t Over…

Free
Science Fiction, Adventure
4.6★ 4000+ ratings

Buy a planet and disappear. That’s all Cole wanted. But when Cole saves a castaway and stumbles into a crew of his own, he starts down a path that will force him to choose.


Amazon

Talented

Free
Science Fiction, Teen
4.3★ 1000+ ratings

Talia Lyons has one goal at the McDonough School for the Talented: learn to use her Talent as a Mental Manipulator to kill Ian Crane, the man who murdered her parents.


Amazon

Of Donkeys, Gods, and Space Pirates

Free
Science Fiction, Humor
4.4★ 100+ ratings

Symbiont Harry, exiled from home, is imprisoned in the form of a donkey. When a galactic animal contest promises a fortune, the talking donkey starts to look like a potential winner.


Amazon

Exodus

Free
Science Fiction
4.1★ 5000+ ratings

When mankind faces extinction, how can anyone survive? As mankind on Earth faces its final blow, the selected few set course for Aurora, more than 40 light years away.


Amazon

The Syndicate

Free
Science Fiction, Teen
4.5★ 500+ ratings

As a Runner for the underground syndicate that controls the timewaves, Stassi’s job is to seamlessly slip through the past to acquire relics once lost in history.


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