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.

Before the Sky Broke

Free
Science Fiction, Novella
4.3★ 10+ ratings

Gas prices spike, power outages cripple, rumors spread of supply chain attacks, and militia recruitment signs hang in high schools. The world hasn’t ended yet. But the cracks are starting to show.


Amazon

Lawless

Free
Science Fiction
4.2★ 750+ ratings

Lark never thought escaping the rural prison known as San Judas was possible, until she learns that the guards outside the walls are disappearing, and the world as they know it is coming to an end.

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.


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Displaced

FEATURED FREE BOOK
Science Fiction, Teen
4.3★ 100+ ratings

When Bea Cooper is unexpectedly transported to another place and time, it will take everything in her power to find a way back home, especially with an evil adversary trying to stop her from ever returning.

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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.


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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.


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Under Falling Skies

Free
Science Fiction, Teen
4.3★ 300+ ratings

A chance encounter with a stranger from the other side of the galaxy threatens to derail Scout’s life. The entire galaxy awaits her, if she survives the next four days.


Amazon

Soldier of Fortune

Free
Science Fiction, Adventure
4.4★ 1000+ ratings

In the distant future, on the planet Fortune, a disgraced soldier, a pint-sized thief, and a draco with attitude take on assassins, spies, and mercs-for-hire in a long overdue fight for justice.


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

Emergence

Free
Science Fiction, Action
4.0★ 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.

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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

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.

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Legacy

Free
Science Fiction, Teen
4.2★ 300+ ratings

Willow Oak Watson is locked inside an experimental world. Fillion Nichols has never met the girl who haunts his dreams. A chilling secret forever binds their lives together.


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Resistance

Free
Science Fiction, Action
4.1★ 100+ ratings

Her remote forest community isn’t safe anymore. Driving damaged roads to a city she hasn’t seen for six years, Jac uncovers disturbing truths about those controlling their lives


Amazon

Al Clark

Free
Science Fiction, Adventure
4.3★ 2500+ ratings

Al Clark is on a quest that will take him places he could not have imagined, manage feats he would not have thought possible, and teach him the true meaning of friendship.


Amazon

Christmas Presence

Free
Science Fiction, Teen, Holiday
4.7★ 30+ ratings

From droids in Santa suits to gingerbread rebels with attitude, Van and his crush Charli are stuck in a war between myth and madness after they were dragged into a virtual game that contained a whole world.

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