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.

Midnight Wings

Free
Science Fiction, Adventure
4.3★ 500+ ratings

In El’s fantasies, she pilots a fighter jet for the intergalactic fleet. In reality, she’s a mechanic whose social ranking keeps her as hired help to her stepmother. An exciting science fiction retelling of Cinderella.

Amazon

Displaced

Free
Science Fiction
4.3★ 2500+ ratings

When Kevin Murdock is revived from suspended animation aboard a transport pod, he and his nine fellow occupants discover something dangerous… something that might cost them all their lives.


Amazon

Spinward Fringe: Origins

Free
Science Fiction, Collection
4.4★ 5000+ ratings

In the distant future, one man’s mundane life takes a thrilling turn when he and his friends are thrown into a dangerous mission to acquire technology and knowledge for their nation.


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Ava’s New World

Free
Science Fiction, Novella
4.4★ 100+ ratings

Ava has a secret that could shift the balance in a world divided by wealth and technology. Although she’s inherited her father’s ingenuity for robotics and engineering, Ava has transcended her roots.

Amazon

The Survivors: Summer

Free
Science Fiction, Suspense
4.2★ 1000+ ratings

Humankind’s extinction event has come and gone. Sandy McDermott survived, but can she find a way to live in this bold new world without losing her humanity along the way?


Amazon

Take the Shilling

Free
Science Fiction, Action
4.1★ 200+ ratings

Tomas Neumann seeks escape from his backwater planet and his overbearing mother and needs a mentor. Enlisting in the Confederated Worlds military is his only opportunity.


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Rush

Free
Science Fiction, Teen
4.4★ 200+ ratings

After an accident, Miki Jones is pulled from her everyday life, trapped in an alternate reality game where she and a team of other teens battle deadly alien creatures bent on mankind’s destruction.


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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.


Amazon

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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Close Liaisons

Free
Steamy Romance, Science Fiction
4.1★ 5000+ ratings

For college student Mia Stalis, the invaders—the beautiful, mysterious, vampiric Krinar—are only stories on the news. None of it concerns her until she catches Korum’s eye.


Amazon

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.

Amazon

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.


Amazon

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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