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.

Oasis

Free
Science Fiction, Suspense
4.0★ 2500+ ratings

Theo is a resident of Oasis, the last habitable area on Earth. It’s meant to be a paradise, a place where we are all content. But some of aren’t.


Amazon

Peace Warrior

Free
Science Fiction, Action
4.3★ 1000+ ratings

It’s the mid-21st century when Sergeant First Class Grant Justice is killed during an ambush on an enemy tank column. Six hundred years later, his body is retrieved and reanimated.


Amazon

On Distant Shores

Free
Science Fiction, Adventure
4.3★ 1000+ ratings

When Chief Warrant Officer Mike Duggins and his team are assigned to a DARPA black site, reality is changed instantly, leaving them in an unrecognizable world, stalked by draconic predators.


Amazon

Lost Souls

Free
Science Fiction, Adventure
4.6★ 75+ ratings

A smuggler, a stowaway slave, and a pirate find themselves on a collision course deep in the no-man’s-land of space, tracking a centuries-old mystery.


Amazon

The Dawn

Free
Science Fiction, Suspense
3.9★ 500+ ratings

Zachary Christian is Delta Tower resident 8652. He has been stuck inside his tower since the war destroyed the world he knew. He should feel lucky to be alive, but is haunted by past mistakes.


Amazon

Neptune Crossing

Free
Science Fiction, Adventure
4.1★ 1000+ ratings

When John Bandicut falls into a cavern on Triton, his life changes irrevocably—and for an alien quarx, a million years of solitude abruptly comes to an end.


Amazon

Town Secrets

Free
Science Fiction, Teen
4.2★ 1000+ ratings

As the child of a struggling single parent, Adam McTaggart never dreamed his life could get more exciting than one day becoming a mechanic- until a nearby community is mysteriously destroyed.


Amazon

Crimson Tempest

Free
Science Fiction, Adventure
4.3★ 2500+ ratings

Fifty-three years after it vanished, Earth’s only Super-Devastator warship, the ESS Crimson sends out a distress signal. Captain John Nathan Duggan is given a mission to find that missing ship.


Amazon

Saving Mars

Free
Science Fiction, Teen
4.2★ 750+ ratings

Some pilots follow orders. Others just wing it. Grounded for her Top Gun attitude, Jessamyn jumps at the chance to fly a covert mission to off-limits Earth and save her world from starvation.


Amazon

Rescue on Gimhae

Free
Science Fiction, Adventure
4.4★ 200+ ratings

Sgt Seavers of the Orphan Corps is having a run of bad luck. After a fight, he is informed of his penance. To get back his chance at officer candidate training, he’ll do his best or die trying.


Amazon

The Bionics

Free
Science Fiction, Action
4.0★ 1000+ ratings

It is the year 4006, and nuclear war has come to the United States. The Restoration Project offers the sick and injured a second chance. Until the Bionics are forced to go into hiding.

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Emergence

Free
Science Fiction, Action
4.1★ 1000+ ratings

Aliens have invaded the Milky Way. Captain Martin and his fleet at the opposite end of our galaxy are all that stand between the emerging ancient aliens and certain destruction of humanity.

Amazon

Time’s Assassin

Free
Science Fiction, Adventure
3.9★ 50+ ratings

In 2073, the once-mighty United States teeters on the brink of economic collapse, its industries in ruins. But for those who make it through time traveler training, wealth and freedom await.


Amazon

HADRON Dark Matter

Free
Science Fiction, Action
4.2★ 2500+ ratings

When scientists at the Large Hadron Collider discover dark matter, celebration quickly turns to catastrophe. Lights go out. Networks are gone. Civilization collapses in an instant.

Amazon

Galaxies Lost – Episode One

Free
Science Fiction, Adventure
4.3★ 50+ ratings

Jodi is the greatest traitor the Coalition has seen – at least that’s the theory. Rotting for two years in jail, she’s dreamed of saving the galaxy. But she’s forgotten that redemption isn’t easy.

Amazon

War Without End

Free
Science Fiction, Action
4.2★ 400+ ratings

The Terran Empire, the greatest empire in the history of humanity, is crumbling. Throughout the galaxy, planetary systems seek independence and freedom. What price will Danny pay for freedom?


Amazon