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.

Birth of a Star

Free
Science Fiction, Novella
4.3★ 30+ ratings

So when Aldrea’s father is taken prisoner by a deranged Radical agent on a deserted planet, she doesn’t think twice–she goes after them. But time is running out.


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Endpoint

Free
Science Fiction, Adventure
4.3★ 300+ ratings

A final shadow swallows the Sun and Earth, and in mere minutes, humanity is erased from the cosmos—all save one. When Ryan McBain regains consciousness, he is drifting alone in orbit.


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Sky Hunter

Free
Science Fiction, Adventure
4.1★ 1000+ ratings

Air Command pilot Nova Whiteside is assigned to a remote outpost to guard the construction of a new orbiter, Skyranch Twelve, against rebel sabotage.

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Well of Furies

Free
Science Fiction, Adventure
4.2★ 1000+ ratings

The godlike Ulltrians waged war on all life among the stars. Long thought extinct, the Ulltrians have returned. Now all the Galaxy is in danger. Humanity faces extinction.


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Maverick Gambit

Free
Science Fiction, Adventure
4.3★ 1000+ ratings

In Maverick Gambit, a ragtag crew crosses a galactic corporation to protect a town from space pirates.

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Mutation

Free
Science Fiction, Action
4.5★ 500+ ratings

Alex survived the virus, but it left him mutated. Forced into a precarious alliance with a man who hates people like him, Alex must discover the truth about this new strain.

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Beyond

Free
Science Fiction, Adventure
4.4★ 1500+ ratings

Aimee has been kidnapped, but after falling in love with Zak, she is now torn with the decision to return to Earth or live beyond the stars.


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A Thief in Time

Free
Romance, Science Fiction, Historical
4.2★ 1000+ ratings

Halley, who covers house-sitting jobs for her self-absorbed mom, has Hollywood dreams but no real life. Until the day a job for her mom leads to a tumble back in time to London, 1598.


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Emerging Storm

Free
Science Fiction, Adventure
4.0★ 200+ ratings

Celeste never wanted anyone to know her secret. And, she never dreamed it would lead her to become the Grekk Empire’s top envoy. Now, the last human serves humanity’s greatest enemy.

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Origins: Zombie Games

Free
Science Fiction, Adventure
4.2★ 1000+ ratings

Seventeen-year-old Cassandra Wild thought that living in the chaos of her mother’s home and her feelings for Bryce were a struggle until the whole world turned upside down.

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Given

Free
Steamy Romance, Science Fiction
4.3★ 1000+ ratings

Davien will do whatever it takes to get back into space. The last thing he needs is a smart-mouthed and sexy thief whose scent drives him wild.

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Surviving The Evacuation: Wasteland

Free
Science Fiction, Suspense
4.4★ 5000+ ratings

Four months after the outbreak, Bill Wright found safety in southern England. He believes he knows the origin of the conspiracy that created the undead, but he needs answers.


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The Green Knight

Free
Science Fiction, Adventure
4.0★ 750+ ratings

Near the border between two kingdoms, a vessel full of innocent passengers is destroyed. While the extent of the impending retaliation is unknown, its inevitability is not. Galactic war is approaching.


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The Chaos Job

Free
Science Fiction, Adventure
4.5★ 75+ ratings

After 20 years of fighting the border wars, the damaged AI on Sil’s farm herds sheep into symbols visible from orbit. Not knowing how to channel the chaos elsewhere, she enlists the help of a former enemy soldier.

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The Sea of Storms

Free
Science Fiction, Adventure
4.1★ 750+ ratings

A ruthless invader is forcing the native Kelanni population to mine a substance from another universe with infinitely destructive power. Only a ragtag group stands in the way.


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Yesterday’s Thief

Free
Science Fiction, Thriller
4.4★ 1500+ ratings

When a woman materializes in midair during a televised baseball game, private detective Eric Beckman vows to figure out where—or when—she came from. And if he can’t unlock her secrets, the world will spiral into chaos.


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