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.

Girl Fights Back

Free
Thriller, Science Fiction
4.4★ 1000+ ratings

Emily Kane has gone missing and the world’s spy agencies are determined to find her. They think she’s been genetically modified as a human weapon. Now, she’ll need all her skills to see tomorrow.


Amazon

The Last Orphans

Free
Science Fiction, Teen
4.1★ 2500+ ratings

Filled with cinematic science fiction action, end of the world apocalyptic events, and heart pounding thrills, The Last Orpans will leave you enthralled from beginning to end. 

Amazon

Reaper’s Run

Free
Science Fiction, Action
4.3★ 1000+ ratings

When Marine Sergeant Repeth’s blown-off legs begin to regenerate, she thinks it’s a miracle. But the breakthrough is exactly what the government desperately wants to quash.

Amazon

Apache Dawn

Free
Science Fiction, Suspense
4.3★ 1000+ ratings

When things seem like a return to normal after a decade of chaos, a devastating virus returns–this time as a weapon. And the unique properties of Chad Huntley’s blood alone can help craft a cure.


Amazon

Arena 1

Free
Science Fiction, Teen
4.1★ 1000+ ratings

There is only one rule to Arena 1: no one survives. Ever. Brooke must save her sister before it’s too late.

Amazon

The Amplified

Free
Science Fiction, Teen
4.3★ 750+ ratings

15-year-old Mari Quillen is about to become invincible. Just like everyone else. Once she finally becomes Amplified, her natural ability to resist and act for herself brings dangerous consequences.


Amazon

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

Free Falling

Free
Thriller, Science Fiction
4.1★ 2500+ ratings

A fun family vacation turns into an apocalyptic nightmare when a couple and their young son find themselves trapped in the Irish countryside during an international crisis.


Amazon

Stage 3

Free
Horror, Suspense
4.3★ 500+ ratings

Blindness is just the beginning. Once the virus strips away everything remotely human, all that’s left is a mindless, savage predator.


Amazon

The 28th Gate

Free
Science Fiction, Adventure
4.3★ 1000+ ratings

When he accepted the job on a backwater planet, Hunter thought it would be easy to track down a missing researcher. But when he finds her, he realizes all is not as he was told.


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

The Red Hourglass

Free
Science Fiction, Adventure
4.1★ 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

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

Alea Jacta Est

Free
Thriller, Science Fiction
4.3★ 500+ ratings

Erik Larsson’s world changes forever the day the lights go out. Hours turn into days, and word spreads that terrorist attacks have thrown the whole nation into the darkness. It all unravels.


Amazon

Starship Waking

Free
Science Fiction
4.4★ 1000+ ratings

Throughout the galaxy, the reclusive alien race known as The One are incapacitated by terror. Meanwhile, on an icy, barren world, a starship dreams of doom. The starship is waking, and the galaxy will be shaken to its core.

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