30 Of The Best Free Books On Amazon – Sci-Fi Adventures

Sci fi books offer some amazing stories. But the best part about these adventures are that they are completely free! So, try out as many books as you want until you meet your sidekick, at no cost. And we all know that no matter how a good a novel is, the only thing that can make it better is if it is free. So, check out the best free books on Amazon now!

Best Free Books On Amazon: deadly enemy
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Deadly Enemy – Gray Lanter

Logan Ryvenbark thrives on long odds. He and his squad of brave men and women have made it a habit of overcoming impossible situations. But after accepting an assignment from a powerful intergalatic CEO, his team will encounter the real threat lurking just beyond the borders of the galaxy.

Best Free Books On Amazon: quantum tangle
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Quantum Tangle – Chris Reher

Dropping out of sub-space into the wrong galactic sector, Sethran Kada wakes up with a headache and an extraordinary alien aboard his ship. She implores him to help stop the abductions of her people. But things get personal when his alien visitor begins to transform his mind and his life.

best free books on amazon: alien hunters
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Alien Hunters – Daniel Arenson

The skelkrins are predators from deep space. Creatures of claws, fangs and unending malice. They swarm across the galaxy, burning planets in their wake. And now they’re heading to Earth. It’s up to Raphael “Riff” Starfire and his team to hunt them down.

best free books on amazon
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Star Nomad – Lindsay Buroker

The Alliance has toppled the tyrannical empire. It should be a time for celebration. But not for fighter pilot Captain Alisa Marchenko. After barely surviving a crash in the final battle for freedom, she’s stranded on a dustball of a planet. However, she has a plan to return to her home.

best free books on amazon: broken world
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Broken World – Kate L Mary

When a deadly virus sweeps the country, Vivian sets out for California in the hopes of seeing the daughter she gave up for adoption. Then her car breaks down and she’s faced with the choice: give up or accept a ride from risky strangers.

best free books on amazon: grace lost
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Grace Lost – M Lauryl Lewis

Two childhood friends, an abandoned cabin in the woods, and a lazy weekend together. Until a dead man stumbles out of the woods. They are thrown together in a race to find safety in a world where the rules of nature have suddenly been rewritten.

best free books on amazon: exodus
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Exodus – Andreas Christensen

In 2072, Earth faces the ultimate extinction event. And in an America turned authoritarian, a race against time begins. To send a starship to a distant planet, where the remains of humanity can survive. But only a small number will be chosen for this final endeavor. And among the contenders, only the most resourceful will have a chance.

best free books on amazon: mutation
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Mutation – Nerys Wheatley

Alex survived the virus that turns its victims into mindless flesh-eaters, but it left him mutated, with super-human strength and white eyes. The world has lived with the virus for thirteen years, but now a new strain is turning thousands into ravenous monsters, faster than ever before. And Alex is trapped right in the middle of an outbreak.

best free books on amazon: starshine
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Starshine – G S Jennsen

Alexis Solovy is Earth Alliance royalty, her father a fallen war hero and her mother an influential military leader. But she seeks only the freedom of space and has made a fortune by reading the patterns in the chaos to discover the hidden wonders of the stars. Nothing about her latest objective suggests the secret it conceals will turn her life upside down.

best free books on amazon: new reality: truth
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New Reality: Truth – Michael Robertson

When the Rixon Corporation released New Reality, a fully immersive, five-dimensional entertainment experience, everyone logged on. Everyone except Jake and Tom. Living in the ruins of the old world, the pair face the wrath of Rixon and starvation as they embark on a fight for survival and freedom.

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E – Kate Wrath

Life is harsh. It makes no exceptions. Not even for the innocent. Eden is determined, smart, and a born survivor. Stripped of her memories and dumped on the streets of the Outpost, slavers and starvation are only the beginning of her problems. A devastating conflict is coming that threatens to consume her world and tear her newfound family apart.

best free books on amazon: the backdoor man
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The Backdoor Man – Dave Buschi

All credit cards have stopped working. Today. This morning. What cash you have in your wallet is it. ATMs and bank systems are down. James Kolinsky’s day goes from bad to worse when he discovers that his greatest fear is his fault and what’s happened to him has happened to millions of others.

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Ashes Of The Fall – Nicolas Erik

In the year 2048, the crumbling remnants of western North America are suddenly buried in ash, weakening the grip of the brutal dictatorship. A factional landscape springs from the ashes, con man Luke Stokes artfully navigating the clash. But he can’t remain above the fray for long.

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Trilisk Ruins – Michael McCloskey

Telisa Relachik studied to be a xenoarchaeologist in a future where humans have found alien artifacts. But they haven’t ever encountered live aliens. When a group of artifact smugglers recruits Telisa, she can’t pass up the chance at getting her hands on objects that could advance her life’s work. But she soon learns her expectations of excitement and riches come with serious drawbacks.

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Sky Hunter – Chris Reher

Air Command pilot Nova Whiteside is assigned to a remote outpost to guard the construction of a new orbiter against rebel sabotage. But when she is trapped behind enemy lines in a bloody uprising she meets Djari, a civilian whose trust in the governing Union is shattered by what he has witnessed.

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Vengeance Lost – J L Stowers

Humanity has been fighting the alien threat for decades, and the war just ratcheted up a notch. Sent to aid a dreadnaught under siege, Dani Devereaux and the crew of Alaska’s Vengeance find themselves caught in a trap.

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The Boy Who Fell From The Sky – Jule Owen

It is 2055. Floods have devastated London. Confined to his house with only his cat, his mother’s domestic robot, and his holographic dragons for company, Mathew Erlang is desperate for a distraction. He finds it in his peculiar and reclusive neighbour, August Lestrange.

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Oasis – Dima Zales

Theo is a resident of Oasis, the last habitable area on Earth. It’s meant to be a paradise, a place where we are all content. Vulgarity, violence, insanity, and other ills are but a distant memory, and even death no longer plagues us.

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Mind Machines – Dima Zales

With billions in the bank and his own venture capital firm, Mike is living the American dream. Until a car accident that leaves his mother with memory problems. Brainocytes, a new technology that can transform brains, could be the answer to all of his problems. But he’s not the only one who sees its potential.

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The Thought Readers – Dima Zales

I may have 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. I can go outside time into my own personal version of reality where I can explore my surroundings while the rest of the world stands still. I thought I was the only one who could do this—until I met her.

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The Institute – Kayla Howarth

Allira Daniels will do anything to keep her Defective brother safe from the Institute. They claim to protect Defectives, but it’s human nature to fear the unknown. To Allira and the rest of her family, the Institute seems more like a prison than the safe-haven they promote themselves to be. Protecting Shilah from that fate is their number one priority.

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Fallen Star – Richard Turner

A sudden and brutal attack on a coalition training camp in Iraq wipes out all but two survivors. Drawn into a clandestine world that deals with unusual encounters the two soldiers volunteer to help with the investigation into an alleged UFO crash in Alaska. The mission, however, is far from simple as it soon becomes apparent that something dangerous is going on.

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The Enemy Of The Enemy – Vincent Trigili

Vydor is riding a wave of success. But now his ship, the Dragon Claw, is being sent to investigate a mysterious event deep within the Empire’s space. A secret research colony has fallen silent and the forces sent to investigate were never heard from again.

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Qualify – Vera Nazarian

The year is 2047. An extinction-level asteroid is hurtling toward Earth, and the descendants of ancient Atlantis have returned from the stars in their silver ships to offer humanity help. They can only take a tiny percent of the Earth’s population. And in order to be chosen, you must be a teen, you must be bright, talented, and athletic, and you must Qualify.

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Rift – Andreas Christensen

In the ruins of what was once North America lays the Covenant, a nation forged by the iron will of the Moon people. They are wealthy, ruled by a strong government who protects its citizens from the dangers from outside their borders. Their greatest achievement is having learned the secret of immortality. And every citizen has the opportunity to live nearly forever if they choose to.

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Next Afterburn – Scott Nicholson

Five years after a devastating solar storm wipes out civilization and spawns a strange race of mutants, Rachel Wheeler and her misfit family must choose whether to hide away or fight to join other survivors. In this decaying environment, hostile new creatures crawl out from the crevices and up from the waterways to threaten them all.

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Outlaw – Edward W Robertson

In the year 2010, an alien virus nearly wiped out the human race. A thousand years later, mankind has recovered and ventured into space. There has been no sign of the aliens since. Humanity remains confined to the Solar System. All that is about to change.

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Yesterday’s Thief – AL Macy

Private detective Eric Beckman can read minds. Although he reads only the conscious thoughts of the people he interviews, it usually gives him enough of an edge to overcome his inexperience as a PI. But mind reading is hell on relationships. Trusting comes hard when you know what people are really thinking.

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AMP Messenger – Stephen Arseneault

In a distant galaxy, Humans are on the run. An insane species follows. Trapped on an immense station with limited resources, our only option has been to flee. Years of peace are over. War is again coming to the Grid. This time however, humanity will stand and fight.

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Flying The Storm – C S Arnot

The Gilgamesh is a colossal airborne warship and relic of the Thirty-Year War. Once the glorious flagship of the North Atlantic Union, it has become a hive of renegades and pirates, unchallenged in the skies over Eurasia. Like an angry god, it dominates wherever and whomever it chooses. Now it has chosen the Crimean Peninsula, the most lucrative trade hub on the Black Sea.

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Forager – Peter R Stone

Twenty-year-old Ethan Jones lives in a post-apocalyptic, oppressive society that terminates anyone with mutations caused by nuclear radiation. But he has an incredible mutation that gives him an edge when foraging in Melbourne’s ruins. His life becomes complicated when he rescues a mysterious Japanese girl from the Skel and brings her back with him. 

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Incubation – Laura Disilverio

Bio-chemistry whiz Everly Jax wants one thing: to know who her parents are. Raised with other repo kids in InKubator 9, she has pinned her hopes on Reunion Day, the annual event where sixteen-year-olds can meet or reunite with their parents. When her Reunion Day goes horribly awry, she and her pregnant friend Halla escape the Kube, accompanied by their friend Wyck.

Which of these best free books on Amazon will you be reading next? Let us know!

If you liked this, then check out Science Fiction Books List: 50 Best Sci Fi Reads Of All Time!

30 Of The Best Free Books On Amazon – Sci-Fi Adventures
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