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.

Legacy

Free
Science Fiction, Teen
4.2★ 300+ ratings

Willow Oak Watson is locked inside an experimental world. Fillion Nichols has never met the girl who haunts his dreams. A chilling secret forever binds their lives together.


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Forgotten

Free
Science Fiction, Supernatural
4.4★ 1000+ ratings

While struggling to regain her memory, Lena explores her extrasensory powers. As she tries to figure out who and what she is, she makes a frightening discovery.


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The Cartographer

Free
Science Fiction, Adventure
3.8★ 100+ ratings

After Nathan accidentally unlocks an ancient artifact, a chain of events is set in motion… one that threatens to tear at the very fabric of the universe, and to destroy Earth.


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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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Under Falling Skies

Free
Science Fiction, Teen
4.2★ 100+ ratings

A chance encounter with a stranger from the other side of the galaxy threatens to derail Scout’s life. The entire galaxy awaits her, if she survives the next four days.


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Descent into the Void

Free
Science Fiction, Adventure
4.0★ 500+ ratings

Responsible for the development of the Union’s most secretive weapon system, Stiler and his ragtag crew of Marines have one chance to turn the tide of the war.


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The Running Game

Free
Science Fiction, Adventure
4.2★ 300+ 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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Moonchild

Free
Science Fiction, Teen
4.3★ 200+ 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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The Kalis Experiments

Free
Science Fiction, Adventure
4.1★ 100+ ratings

Syrina, a Kalis master of disguise, embarks on a perilous mission in the steam-powered city of Fom where she learns of a machine that could end civilization a second time.


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Space Colony One: Books 1-3

Free
Science Fiction
4.3★ 1000+ ratings

A new planet is not the paradise the scientists predicted. With alien predators lurking and stowaway saboteurs, Ethan must fight to preserve the last hope of humankind.


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Symbiosis

Free
Science Fiction
4.0★ 750+ ratings

Pursuing an escaped alien, Justice Keeper Anna Lenai discovers her ancestors’ lost homeworld.

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Scarlet Angel

Free
Science Fiction, Action
4.4★ 50+ ratings

Scarlett’s quest for her forgotten past leads her into a dangerous world of espionage and crime.

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Playing In The Rain

Free
Science Fiction, Suspense
4.0★ 200+ ratings

The discovery of a long-lost sister leads to a desperate bid for freedom in the riveting post-apocalyptic book Playing In The Rain.

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Maelstorm

Free
Science Fiction, Adventure
4.1★ 500+ ratings

Join Gideon Rayne on a thrilling adventure through the futuristic world of New Britain in Maelstorm.

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Genesis

Free
Science Fiction, Adventure
4.3★ 20+ ratings

Nicolette Fuller’s dystopian adventure explores themes of resilience, friendship, and the enduring hope of humanity.


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Storm Portal

Free
Science Fiction
4.3★ 400+ ratings

In this sci-fi adventure, teacher Fritz Russell finds himself at the crossroads of past and present, facing a challenge that could change history.


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