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.

Trixie & Me

Free
Science Fiction, Novella
4.3★ 200+ ratings

Trixie and Berry are trapped on an alien spaceship. Berry can’t move, but he seems to understand what’s going on. Trixie is confused and has no recollection of how they ended up in an alien warship.


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Dinosaur Wars: Earthfall

Free
Science Fiction, Action
4.1★ 750+ 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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The Legend of the Bloodstone

Free
Science Fiction, Romance
4.3★ 2500+ ratings

A modern day woman, Maggie is thrust back in time where she is captured by Winn, a warrior who is torn between his duty to kill her and his desire to keep her.


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Pawns

Free
Science Fiction, Action
4.4★ 100+ ratings

A powerful alien race has invaded Earth, wiping out half of the human population. In a hidden base under the Sahara Desert, a team of scientists works to mount a resistance against the invaders.


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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.


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The Helavite War

Free
Science Fiction, Adventure
4.1★ 200+ ratings

Jake is a human mercenary looking for a quiet place to rest when his Protect Dar-dolf attacks the last living Henu, Arr. Feeling responsible, Jake stays on to care for the blue-eyed alien.


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It Ain’t Over…

Free
Science Fiction, Adventure
4.6★ 5000+ 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.


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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.


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Nullform

Free
Fantasy
4.6★ 200+ ratings

In this world, everyone starts with no memory and no recollection of their past life. In this world, you’re under unrelenting supervision, and you’re assigned a number. You’re a volitional Nullform.


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Negation Force

Free
Science Fiction, Action
4.3★ 2500+ ratings

After Atlantis is attacked, Sergeant Eric McKinney is determined to fight back and find out why the Vraxar have come. The answers are more shocking than anyone could imagine.


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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.


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Apocalypse Awakening

Free
Science Fiction, Suspense
4.2★ 10+ ratings

Celebrated war hero Michael Conway is fighting on the front lines of the war and public chitchat when he’s abandoned in an empty, devastated city. It’s on him to discover what’s happened to the world.


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Watchers

Free
Science Fiction
4.2★ 500+ ratings

When two friends help a mysterious woman who holds a secret that defies all we know about human evolution, they are plunged into a nightmarish race across the globe to recover a relic so ancient it’s fallen into legend
.

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Flight of the Old Wolf

Free
Science Fiction, Action
4.2★ 50+ ratings

Deranged by centuries in thrall to obscene alien gods, the Golgothan Empire is ready to make its big move. And a meeting of the star-nations is a perfect way to get all their enemies in one place.


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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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Breakers: Books 1-3

Free
Science Fiction
4.4★ 7500+ ratings

In the Breakers series, humanity faces not one apocalypse, but two: first a lethal pandemic, then a war against those who made the virus.


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