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.

Guardian

Free
Science Fiction, Action
4.1★ 500+ ratings

Alone and hunted, Amber connects with Raven, a young woman, who claims to know her history. According to Raven, Amber is an alien princess exiled to Earth by a war that claimed the lives of her family.

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Irrelevant

Free
Science Fiction, Romance, Teen
4.2★ 500+ ratings

Branded Irrelevant, Mallory is banished to live in the old city. But in the wasteland between the new city and the old, she stumbles on Cristan. To survive, Mallory must figure out who to trust, and embrace the behavior she’s been taught to deny. 


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Outliers

Free
Science Fiction, Teen
4.3★ 750+ ratings

Indra is an Outlier. Living on land that has not healed from the poison of the past, the Outliers have adapted – but to the Sovereign and the Fortis, they are nothing.


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Back to Titanic

Free
Romance, Historical
4.7★ 30+ ratings

Sailing on Titanic 2 was supposed to be a fun trip, but it turned into a nightmare. After a nasty fall, I wake up on the actual Titanic–a ship history says is about to sink in a couple of days.


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Forgotten Stars

Free
Science Fiction, Adventure
4.1★ 750+ ratings

Everything changes when Amber is lost on an alien world and her true powers awaken. She must keep them secret from the Coalition or pay the price.


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Tiger’s Gambit

Free
Science Fiction, Romance
4.3★ 500+ ratings

Earth is dying, humanity borders on extinction. Our plight seems hopeless. When my transport is hijacked, I’m forced to show my true form to protect myself.


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Solar Storm

Free
Science Fiction, Adventure
4.1★ 1000+ ratings

He had the perfect life as a small-town librarian, but the sun had other plans and sent a coronal mass ejection as a wedding anniversary present. In a world where electricity is a thing of the past, can there be any hope for the future?


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Insight

Free
Science Fiction, Novella
4.5★ 100+ ratings

Detective Reese Parker left behind a violent past in Welfare Colony 6 and now works with the New York Enforcer Division to make certain their society never faces another economic and nuclear Breakdown.


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First Strike

Free
Science Fiction, Adventure
4.0★ 200+ ratings

Half-man, half-machine, it’s taken Dale Simpson a long time to come to terms with the accident that almost killed him and the science experiment that saved his life instead.


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Invasion

Free
Science Fiction
4.0★ 200+ ratings

An invasion is what retired Marine Colby Edison calls it when his farm is overrun by alien plants. But Colby has skills other farmers lack on the newly terraformed agricultural world of Vasquez.


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Memoirs of a Time Traveler

Free
Science Fiction, Adventure
4.1★ 2500+ ratings

Archaeologist David Preston comes into possession of a baseball supposedly signed by the legendary Ty Cobb in 1908. Except the ball tests out to be an impossible paradox for alinear timeline.

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When We Were Human

Free
Science Fiction, Teen
4.3★ 100+ ratings

They came four years ago. Invaded our planet, rounded us up, decimated the human race. We fought back, and some even say we won, but they’re wrong.

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Free-Wrench

Free
Science Fiction, Action
4.4★ 1000+ ratings

Nita’s mother has lost her livelihood and perhaps soon her life to a terrible disease. Nita resolves to leave the safety of her home and do whatever it takes to find a cure.

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Wanted

Free
Science Fiction, Adventure
4.2★ 400+ ratings

Josh Gunn detests space pirates. He hunts them down and brings them to justice – one way or another. When he and his android partner Cherry Kang close in on one of the worst, the fireworks start.


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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.

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Enemy Mine

Free
Fantasy, Novella
4.2★ 20+ ratings

Jessie Richter has kept her childhood secret safe and tucked away for over four long years, but she is caught by Military Contractors who sense there is more to Jessie than meets the eye.

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