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.

Hurst

Free
Science Fiction, Action
4.0★ 1000+ ratings

Far from the smoking ruins of the cities, Hurst Castle stands alone. Hurst’s seventy-four occupants grind out a living, scavenging for food and supplies in a lawless society.


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Poppy Bloom

Free
Science Fiction, Romance
4.0★ 50+ ratings

Vicki Morel believes she and her gorgeous fiancé have it all. They’re living the American dream until Portland is leveled by a terrorist grade light weapon, and she loses Will in the chaos.


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Death’s Door

Free
Science Fiction, Historical
4.4★ 1000+ ratings

In the fall of 1849, Edgar Allan Poe disappeared. He was missing for five days and was then found wandering near Gunnar’s Hall in Baltimore. Poe eventually stumbled into the 21st Century.

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Quantum Civil War

Free
Science Fiction, Adventure
4.1★ 200+ ratings

Opamari scientist Reno has discovered a way to send clones back in time, letting connected subjects experience entire human lives in mere moments. But altering the past has dangerous consequences.


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Before the Cure

Free
Horror, Science Fiction
4.2★ 300+ ratings

In Neil’s mind it started with the man in the park. Or, more specifically, with the vicious bite the man had given Neil. He was wrong about that. The December Plague had started weeks earlier, though no one knew it.

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Stealthy Steps

Free
Science Fiction, Christian
4.4★ 1000+ ratings

My name is Gemma Keyes. Other than my name, I am utterly forgettable. But it’s much more complicated than it sounds. And let me tell you, invisibility comes with its own set of problems.


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Harry Watt, Bounty Hunter

Free
Science Fiction, Humor
4.0★ 400+ ratings

Harry Watt is a bounty hunter who discovers something stinks about his latest case. And getting framed for murder doesn’t help. As the case unravels, Harry must call on all his skills to crack the secret of Mars.

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The Mages of Starsea

Free
Science Fiction, Adventure
4.2★ 1000+ ratings

Lucian dreams of a new life outside the cesspool of Earth. Unfortunately, his wish comes true when the government identifies him as a mage. And a mage’s fate is worse than death…


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Firmament: Radialloy

Free
Science Fiction, Adventure
4.3★ 100+ ratings

The year is 2320. Two factions are desperate for a valuable secret. Andi Lloyd must race to help her father and herself before time runs out.

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Lucifer’s Odyssey

Free
Epic Fantasy, Supernatural
4.0★ 200+ ratings

Imagine a war between angels and demons that extends across our universe. Now, think bigger. That’s Lucifer’s Odyssey.

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Anti Life

Free
Science Fiction, Adventure
4.0★ 1000+ ratings

Space-based corporate settlements have replaced the State and Colonel John Alvarez, a fifteen-year veteran, is unwilling to waste more years leading missions into deep space.

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Cyborg Awakenings

Free
Science Fiction, Romance, Novella
4.2★ 100+ ratings

Earth has been nearly destroyed by the Mesaarkans in revenge for a massacre on a distant colony by an Earth survey team. Cyborgs have been created by the thousands to fight this hundred year war.


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Steamborn

Free
Science Fiction, Teen
4.3★ 1000+ ratings

Jacob has yet to meet a gadget he couldn’t fix or an adventure he could resist. When a plague of terrifying creatures descends upon the town, Jacob and his friend have no choice but to run for their lives.


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Arch Allies

Free
Science Fiction, Adventure
4.4★ 500+ ratings

Experience has taught Natasha Orlov one thing —the universe will kick you when you’re down. So when she stumbles onto a starship buried in a sea of sand, she kicks right back.


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Wings of Steele – Destination Unknown

Free
Science Fiction, Action
4.4★ 1000+ ratings

Life as Jack Steele knows it, is about to radically change. Accompanied by his German Shepherd, Steele experiences an abrupt and violent detour into frenzied chaos.

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Lost

Free
Science Fiction, Adventure
4.2★ 100+ ratings

As Sadie begins to uncover the secrets of her past, her rare latent Talent is exposed and she finds herself on the run. Her choice: hide and stay lost, or fight.

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