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.

Revolution

Free
Science Fiction, Action
4.4★ 20+ ratings

Promises are lies. Allies are enemies. Utopia means subjugation. In the turmoil of the early 21st century, First Contact expanded our understanding. Some believe the promises and others seek the truth.

Amazon

Come Home to Me

Free
Romance, Science Fiction, Historical
4.4★ 2500+ ratings

Jake is sent back in time to protect a woman along the Oregon Trail. When he and Rachel’s forbidden attraction turns to love, what will happen at the end of the trail?

Amazon

The Alpha Plague 3

Free
Science Fiction, Suspense
4.4★ 300+ ratings

After having rescued his ex-wife from the diseased in Summit City, Rhys races to meet his son only to discover he isn’t there. But there’s hope. The boy has left a trail.

Amazon

War Bunny

Free
Fantasy, Teen
4.3★ 400+ ratings

In a post-apocalyptic world where humans are extinct and animals thrive, a young rabbit is locked in a ferocious battle for survival—and maybe even freedom.


Amazon

Warpworld

Free
Science Fiction, Adventure
4.4★ 400+ ratings

To save an oppressed people and a dying planet, Seg and Ama must form an uneasy alliance. The fate of two worlds is in their hands, and together, they’ll change the course of history.


Amazon

Close Liaisons

Free
Romance, Science Fiction
4.1★ 5000+ ratings

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

Amazon

Programmed to Please

Free
Science Fiction, Romance
4.1★ 200+ ratings

Human police agent Jai Turner goes undercover as a Beautiful Dolls robot to bring down the planet’s most notorious arms dealer, Marque Callex. But neither Jai nor Marque are what they seem.


Amazon

Patriot Son

Free
Science Fiction, Thriller
4.1★ 200+ ratings

Three nations conspire to take over America and set the stage for WWIII on the shores of the US.


Amazon

The Tube Riders: Underground

Free
Science Fiction, Action
4.2★ 1000+ ratings

Marta Banks is a girl with an identity. She is a Tube Rider, a girl who risks death every day in abandoned underground stations in the dystopian chaos of London in 2075.


Amazon

The Red Hourglass

Free
Science Fiction, Adventure
4.2★ 100+ ratings

Thomas is a runaway slave on a barren continent. He’ll do whatever it takes to seize his freedom and protect his sister, Mia. Alchemy made them slaves. Only their magic can free them.


Amazon

The Tinkerer’s Daughter

Free
Science Fiction, Teen
4.3★ 4000+ ratings

Breeze is a young elven girl left in the care of a strange old Tinkerer. Under his care, she learns that the world is not as simple or safe as anyone would like it to be.

Amazon

Man, True Man

Free
Science Fiction, Adventure
4.1★ 200+ ratings

After a spaceship crashes into Tonath, the lone occupant survives and fights his way to sunlit part of the planet. When more strangers arrive, can they save Tonath from a thousand years of burning?


Amazon

Forager

Free
Science Fiction, Suspense
4.2★ 1000+ ratings

Ethan must keep his mutation a secret while uncovering a girl’s true intentions and trying to save a town from vile Skel savages. But why do the Skel suddenly possess advanced technology – who is backing them, and why?

Amazon

Fire Ant

Free
Science Fiction, Adventure
4.5★ 2000+ ratings

Floribeth, an Off-Planet Worker, has to convince the powers that be that a very real danger to humanity is lying in wait out there in deep space.

Amazon

Ship’s Boy

Free
Science Fiction, Novella
4.1★ 200+ ratings

David Birkenhead might only be twelve years old, but his entire life is already laid out for him. Then the ships of the Boyen Emperor arrive on David’s homeworld and nothing will ever be the same.


Amazon

Nyssa Glass

Free
Science Fiction, Teen, Novella
4.3★ 100+ ratings

Nyssa Glass is faced with a heartrending decision: sacrifice everything or become the very thing she’s desperate to escape.

Amazon