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.

Defending Hope

Free
Science Fiction, Suspense
4.2★ 300+ ratings

When darkness fell, it gave rise to the worst atrocities mankind had ever seen. Now, one man stands between terrifying acts of violence and innocence.


Amazon

The Galathea Chronicles, Books 1-3

Free
Science Fiction, Collection
4.1★ 500+ ratings

Growing up as a Martian on Earth has left Jas Harrington solitary, quick-tempered, and with zero tolerance for fools. Jas’s latest berth on the Galathea might be her last.


Amazon

Breakout

Free
Science Fiction, Adventure
4.5★ 300+ ratings

From high-tech power corridors to the vast reaches of space, take a thrilling journey through a world where superintelligence challenges the very essence of human existence.


Amazon

Fall of the Cities

Free
Science Fiction, Action
4.2★ 500+ ratings

Terrorists spark a worldwide oil crisis while imports grind to a halt. Europe and Britain are erupting into chaos. Corporal Harry Miller just wants his family to be safe.


Amazon

Rewind

Free
Science Fiction, Adventure
4.4★ 300+ ratings

Charlie has a photographic memory and a serious alcohol problem. He’s the perfect candidate for a risky time-travel experiment. No one will miss him. But in the ice age, Charlie will be unforgettable.


Amazon

Ure Infectus

Free
Science Fiction, Action
4.4★ 300+ ratings

Acting together in a tenuous alliance, Jericho and Masozi follow a trail of corruption across the Virgin Star System and discover something that will forever change them.

Amazon

Dillon Hunt And The Desert Oasis Resort

Free
Science Fiction, Action
4.0★ 200+ ratings

Excitement, intrigue, and action are afoot with a stolen chemical, a missing man, a secret organization, and a twelve-year-old boy whose strange abilities might be the answer to solving a mystery.


Amazon

The Shadow Order

Free
Science Fiction, Collection
4.2★ 400+ ratings

If there’s a problem in the galaxy no one else can fix, the Shadow Order gets a call. But they have little time for rest as they embark on one dangerous mission after the next.

Amazon

The Cyborg’s Crusade

Free
Science Fiction, Action
4.0★ 100+ ratings

While walking to a cinema, James Hunter teleports to another world populated by various mutants with strange deformities. To save himself, he aligns with a winged woman who opposes the cyborgs.


Amazon

Exile

Free
Science Fiction, Action
4.5★ 1000+ ratings

Vice Admiral Isaac Gallant is the heir apparent to the dictator of the Confederacy of Humanity. Unwilling to let his mother’s tyranny stand, he joins the rebellion.


Amazon

Out of the Past

Free
Romance, Science Fiction
4.1★ 400+ ratings

Torie Mills decides to find some solace from her fast paced and demanding life by moving to an old family homestead. She discovers that restoring the house opens a portal into the past.


Amazon

The Off Grid Survivor

Free
Science Fiction
4.0★ 1000+ ratings

Twenty-five years ago, Conrad Drake’s life was shattered. Now, he lives a life devoid of modern conveniences and things that do his soul no good. Then, the world around him tumbles into lawlessness.


Amazon

Faring Soul

Free
Science Fiction, Romance
4.3★ 100+ ratings

Rumors emerge that Catherine has been seen in Federation space, so no one pays attention to the reticent navigator called Bedivere X who pilots her ship better than she does.


Amazon

Coronado Dreaming

Free
Science Fiction, Adventure
4.1★ 100+ ratings

Soon after two soul-mates meet, Greg finds himself in the strange, dreamlike world of a coma, a bizarre quantum multi-verse that blends time and distance, love and destiny.


Amazon

Prime City

Free
Science Fiction, Thriller
4.5★ 100+ ratings

Marcie thought preventing a war was tough, but only because she’d never been to Prime City. To some, Marcie is a hero for the part she played in preventing a war. To others, she’s a traitorous liar.


Amazon

The Prometheus Prophecy

Free
Science Fiction
4.1★ 100+ ratings

After global war and endless chaos, an iron-fisted regime now governs society from the elite Inner Cities to the impoverished Outer Areas. Adama, a young doctor, finds hope in resistance.


Amazon