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.

The Emperor’s Edge

Free
Science Fiction, Epic Fantasy
4.4★ 5000+ ratings

The empire’s most notorious assassin is in town and Imperial law enforcer Amaranthe Lokdon’s superiors order her to hunt him down. Either they have an unprecedented belief in her skills… or someone wants her dead.

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The Alpha Plague

Free
Science Fiction, Suspense
4.0★ 2500+ ratings

Do you have a plan for the apocalypse? Rhys doesn’t. But as he watches chaos spill from the Alpha tower, he knows one thing. He must get to his son before the virus does.


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Silent Order: Iron Hand

Free
Science Fiction, Adventure
4.3★ 1000+ ratings

Jack March is an operative of the most efficient and feared intelligence organization in human space. A mission leads March to a lawless space station, where he might be the only one left to fight.

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The Lost Star

Free
Science Fiction, Adventure
4.4★ 500+ ratings

Ava is an Avixan priestess, a powerful being with a powerful destiny to keep her people on the true and righteous path. A destiny she despises. To flee her past, she joins the Coalition Academy.

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Residual Belligerence

Free
Science Fiction, Adventure
4.2★ 500+ ratings

Zach Hilyer is in trouble. He is good, one of the top field operatives in the infamous Thieves’ Guild. Problem is, he can’t remember when it all went wrong.

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Monster of the Dark

Free
Science Fiction, Action
4.2★ 100+ ratings

Carmen Grey is taken to an underground facility for Clairvoyants, stripped of her name and identity, and fashioned into something lethal. Yet her ultimate battle won’t be to save her life but to keep her soul.


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The Necklace: The Dusky Club, June 1962

Free
Romance, Science Fiction
4.1★ 300+ ratings

What if you could travel back into the past to meet the man of your dreams? When Susan does just that, she will learn something important about James and about herself.

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Time Ship

Free
Thriller, Adventure
4.1★ 1000+ ratings

Terrorists have taken over a holiday resort in the Caribbean and are holding everyone for ransom. What dangerous secret must be covered up at all costs to protect the future?


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The Dark of Light

Free
Science Fiction, Adventure
4.5★ 1000+ ratings

For Aurora Hawke, protecting the secret of her half-human heritage has been a lifelong challenge. Taking command of her own starshiphas been her dream. Failing at both is her nightmare.


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Miltan Epsilon

Free
Science Fiction
4.2★ 50+ ratings

Jazz Healy finds herself befriending stowaways, fighting off tech cultists, and hunting down an assassin, all while bonding with a gene-splice kitten and endeavoring to keep her criminal kingpin mother at arm’s length.

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Into Twilight

Free
Science Fiction, Mystery
4.3★ 500+ ratings

Korea, 22nd Century. Surrender isn’t in Stefan Mendoza’s DNA. So when a traitor betrays his black-ops team, he alone pushes through the torture and escapes with revenge burning in his mind.


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Fang

Free
Steamy Romance, Science Fiction
4.2★ 400+ ratings

When vampire dentist Dr Fang (yes, really) gets invited to go to the Intergalactic Dating Agency’s speed dating event as his friend’s wingman, he can’t refuse.


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The Rare

Free
Science Fiction
4.2★ 50+ ratings

Olivia hates being different. But when she starts exploring the world, she realizes everything she thought she knew was a lie.

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The Thought Readers

Free
Science Fiction
4.2★ 2500+ ratings

Everyone thinks I’m a genius. I finished Harvard at eighteen and now make crazy money at a hedge fund. But that’s not because I’m unusually smart or hard-working. It’s because I cheat.


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Invincible

Free
Science Fiction, Suspense
4.4★ 200+ ratings

Ryan’s not like other people. He has a genetic variant that slows aging, regenerates cells, and makes him impervious to toxins. He carries within him a virtual miracle cure that could save lives.


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Onslaught

Free
Science Fiction
4.1★ 300+ ratings

When mutants from civilization’s end come roaring back from exile, telepath Langston Wheeler must confront assassination, interstellar intrigue, and a woman he can’t resist.


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