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 Running Game

Free
Science Fiction, Adventure
4.2★ 400+ ratings

War-torn London sets the stage for Rachel, a doctor with hidden telekinetic powers. With the help of dangerous and dubious allies, can she turn the game around and save herself?

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The Joint of No Return

Free
Science Fiction, Humor
4.0★ 100+ ratings

Charlie Hong is on the run and cooking up a harebrained scheme to escape his troubles: a clandestine marijuana operation. When aliens steal his cash crop, he finds himself in a cosmic struggle.

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War Without End

Free
Science Fiction, Action
4.2★ 500+ ratings

The Terran Empire, the greatest empire in the history of humanity, is crumbling. Throughout the galaxy, planetary systems seek independence and freedom. What price will Danny pay for freedom?


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Mind Machines

Free
Science Fiction
4.2★ 1000+ ratings

Plunged into a criminal underworld darker than anything he could’ve imagined, more-than-human Mike’s life-saving brainocytes might be the death of him.

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Transient

Free
Science Fiction
4.0★ 750+ ratings

In a dark and distant future, death is obsolete. But the fates of billions hang in the balance. When the axe falls, Jonas must choose between his family and his species.


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Clone Three

Free
Science Fiction, Teen
4.3★ 400+ ratings

Clone Three wakes in a decaying city she is sure doesn’t match the one she came from. If only she could remember. She may be lost, but she has a purpose at least- to find her fellow clones.


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Sojourn

Free
Science Fiction, Historical
4.5★ 500+ ratings

For veteran Time Rover Jacynda Lassiter, her current job assignment is no big deal: Find an overdue “time tourist” and return him to 2057, before he changes history. But things get personal.


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Tagrale

Free
Science Fiction, Adventure
4.2★ 100+ ratings

For hundreds of generations, scientists have failed to reactivate the Tagrale to escape the Sironus system. Jenna dreams of being the one to unlock the puzzle, but if she does, she’ll be executed.


Amazon

Station

Free
Science Fiction,
4.2★ 50+ ratings

What is Station? A second chance? A nocturnal paradise? Or something else? When grief-stricken Marlin’s life refuses to end despite his best efforts, he unwittingly earns an invitation to Station.


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ARMS War for Eden

Free
Science Fiction, Action
4.2★ 1000+ ratings

Harris Gruberg and Tawnish Freely, bioengineered Humans, were bred for making war. After training for and fighting in it their entire lives, they find themselves expelled from the military.


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Welcome to Gale City

Free
Science Fiction,
3.9★ 20+ ratings

Beware the ones with glowing eyes! Teo remembers his father’s final warning before being sent to death row. He resolves to leave his past behind—until the night he comes across a man whose eyes glow.


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Moonchild

Free
Science Fiction, Teen
4.3★ 300+ ratings

Scarlett Moon has one goal: Survive. When her best friend is arrested and returned to the mines, Scarlett sets out on a mission to save her friend.


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Fractured Memories

Free
Science Fiction, Teen
4.4★ 100+ ratings

Tainted crops killed millions. The Skinnies ate the rest. Sixteen-year-old Wendy never knew the world before the Starvation. She’s had to put her trust in her knives, and her confidence in her fists.

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Sun Burn

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

A civilization-ending storm kills billions overnight. One family is torn apart amid the chaos, struggling to stay alive. Daylight has become their ultimate enemy.


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Small Beginnings

Free
Science Fiction, Novella
4.3★ 75+ ratings

When your very existence is treason, employment opportunities are thin. But when one of the biggest crime lords in the city makes The Pan an offer, it’s hard to know if he should accept or refuse.


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Stepping Stones to Space

Free
Science Fiction, Suspense
4.0★ 50+ ratings

Earth is a fragile haven. But when Dr. Elizabeth Reacher tries to make humans a multi-planetary species, will her quest to expand humanity’s reach further into the cosmos prove fatal?


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