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.

Cut

Free
Science Fiction, Suspense
4.2★ 1000+ ratings

I’ve reached my expiration date. Not that it matters. We’re all going to die. But truth comes with a price. Two rules carved in bone: Kill. Survive. Because the final wars were never meant to end.


Amazon

I Am John Titor

Free
Science Fiction, Mystery
4.0★ 200+ ratings

Idealistic filmmaker RJ is stuck shooting mundane reality shows when he longs to create documentaries that change the world. An internet legend who claims to time-travel could turn things around.


Amazon

Night of the Purple Moon

Free
Science Fiction, Teen
4.3★ 1000+ ratings

On a small Maine island, Abby Leigh helps her siblings survive in a world where germs attack human sex hormones, but all the while she has a ticking time bomb inside her – adolescence.


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I AM MAN

Free
Science Fiction, Christian
4.3★ 75+ ratings

Fresh from the factory, X5 agrees to help an exiled princess escape from prison. He believes he’ll carry out a simple mission but then the two of them discover a scheme that threatens to unravel the very fabric of the Valetian Empire.


Amazon

The Harvesting

Free
Science Fiction
4.4★ 1000+ ratings

Layla Petrovich, a Smithsonian curator, is busy with her life in Washington D.C., when a pandemic sweeps across the globe. It is the end of everything. Then, the dead begin to rise.


Amazon

The Unusual Clients

Free
Science Fiction, Mystery, Collection
4.3★ 10+ ratings

In a city where the cops are on a mobster’s payroll, private investigator Charlie Madison stands in the gap. He takes the case of a wealthy young socialite, but things aren’t what they seem.


Amazon

The Becoming

Free
Science Fiction, Action
4.2★ 1000+ ratings

The Michaluk Virus is loose. As the virus transforms the population into homicidal cannibals, three people band together against the oncoming crush of death and terror.


Amazon

Bypass Gemini

Free
Science Fiction, Adventure
4.4★ 1000+ ratings

A package gets Trevor “Lex” Alexander mixed up with mobsters, a megacorp, and a mad scientist. Now his life depends on learning what their plans are and how he can stop them.

Amazon

Nephilim

Free
Science Fiction, Novella
4.5★ 75+ ratings

Nephilim is a cybernetically enhanced super-soldier, created to protect and destroy. Protect the Olympias Conglomerate, the mega-corporation that owns them, and destroy its enemies– at any cost.


Amazon

First Strike

Free
Science Fiction, Action
4.3★ 2500+ ratings

When war comes, it is sudden and brutal. Second Lieutenant Michael Sheridan finds himself thrust into a desperate conflict that he and the untried soldiers under his command are not ready for. 

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Alien Species Intervention

Free
Science Fiction, Suspense
4.0★ 1000+ ratings

After years of enslavement, Netty flees into the night from her husband, traveling back to her parents’ farm, where she rescues an enigmatic and damaged creature named “Baby” with whom she falls in love.


Amazon

Traveler in The Dark

Free
Science Fiction
4.0★ 500+ ratings

Sixteen hundred years ago, they fled Earth. Now their long journey may finally be at an end. But they must make a choice. Sacrifice another species or accept their own extinction. And time is running out.

Amazon

Aurora: Darwin

Free
Science Fiction, Suspense
4.3★ 750+ ratings

When a distress signal is received from a black-ops space station on the edge of inhabited space, Captain Saul Harris of the UNF Aurora is called in to respond. But the mission is not what it seems.


Amazon

Open Minds

Free
Science Fiction, Teen
4.2★ 2500+ ratings

Sixteen-year-old Kira Moore is a zero, someone who can’t read thoughts or be read by others. When everyone reads minds, a secret is a dangerous thing to keep.


Amazon

We the People

Free
Science Fiction
4.1★ 200+ ratings

In the late 21st century, a neurotechnology called Bridge changed the world. A new world order developed. Bridged Children grew smarter, faster, and stronger than Adults and began a war for equality.

Amazon

Under A Dark Sky

Free
Science Fiction, Action
4.1★ 75+ ratings

On rebel planet Elysium, a man is executed on live video streamed by religious extremists. Nothing terribly original so far for Elysium. Only this time, the man doesn’t die.


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