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 100 free Kindle science fiction books.

Fallen Star

Free
Thriller, Action
4.2★ 2500+ ratings

Fallen Star follows two soldiers that are drawn into a clandestine world that deals with unusual encounters and alleged UFOs.

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Max and the Multiverse

Free
Science Fiction, Humor
4.1★ 1000+ ratings

Thanks to a bizarre mishap, Max has started shifting between parallel universes whenever he sleeps. Soon, he and his cyborg cat are entangled in an intergalactic conflict.


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Transmission

Free
Science Fiction, Action
4.0★ 2500+ ratings

A 13 year old boy, dying of a rare brain disease, is the only one able to hear and decode signals from outer space. SETI confirms it is a real signal.

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Fighting the Silent

Free
Science Fiction, Action
4.2★ 150+ ratings

Fighting the Silent, the first in The Dark Sea War Chronicles, is a scifi novel that brings you to a dark hard world at war.

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The Necklace: The Dusky Club, June 1962

Free
Romance, Science Fiction
4.2★ 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 Alpha Plague 2

Free
Science Fiction, Action
4.5★ 400+ ratings

Equipped with nothing but a baseball bat and his wits, Rhys enters Summit City for a second time. His son wants his Mummy, and Rhys is the only one who can save her.


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Betrayal

Free
Science Fiction, Adventure
4.2★ 2000+ ratings

Captain Shepperd is about to learn that you can’t hide from the sins of your past, especially when the priceless synthetic stowaway on his ship is programmed to kill.


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Earthbound

Free
Science Fiction, Historical
4.2★ 200+ ratings

Marooned in the 19th century US West, an alien must survive and return to his homeworld to destroy his mortal enemies and avenge his people.


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Miltan Epsilon

Free
Science Fiction
4.2★ 50+ ratings

Miltan Epsilon follows Jazz Healy as she runs valuable cargo via a galaxy-spanning criminal organization.

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The Emperor’s Edge

Free
Science Fiction, Epic Fantasy
4.4★ 2500+ ratings

In the steampunk fantasy The Emperor’s Edge, law enforcer Lokdon must hunt down the empire’s most notorious assassin.

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Outworlder

Free
Science Fiction, Novella
3.9★ 1000+ ratings

When Jeremiah arrived at Megiddo Station, all he wanted was to make some trades and resupply his starship. He never thought he’d come away with a wife.

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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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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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Traitor

Free
Science Fiction, Adventure
4.2★ 200+ ratings

On the edge of a far frontier rests a place of gentle manners and common civility–Last Chance. Threats of war change all of that. Aaron may not be all that they hoped for.

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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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