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Free Kindle eBooks | Hard Science Fiction |

Showing Free eBook 1-30 of 282
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The Invitation: A Journey Into Mankind's Future by Michael Mckinney

When the President of the United States stands before thousands in Miami, Florida welcoming the world to the start of the Summer Olympic games, the global event is watched by uncounted millions. No one could've foreseen the astonishingly dramatic events that will play out before spectators...

Genre: Fiction, Science Fiction & Fantasy, Science Fiction, First Contact, Hard Science Fiction / Size: Unknown / Free from 25 February 2020   Rating: 5.00 / 5 5 reviews

The God Machine by Michael Campling

Areva dreams of the day when he will become a Scribe and contribute to The Collective - the tethered souls, connected to the God-Machine. The Scribes write the Universe into Existence, and it's Areva's destiny to join them.
But as his time draws near, he hesitates. Perhaps the God-M...

Genre: Fiction, Science Fiction & Fantasy, Science Fiction, Cyberpunk, Dystopian, Hard Science Fiction, Steampunk, Teen & Young Adult / Size: 15 pages / Free from 25 February 2020   Rating: 4.10 / 5 6 reviews

Alder's World: Part One: Mass 17 by Katie Papilio

The latest from The Dryden Experiment's founder and Chief Editor.

Pushing past the boundaries of chartered territory, Lieutenant Commander Samuel Alder and the crew of the League of Planet's deep space research vessel, "The Duster" encounter a mysterious protoplanetary disc an...

Genre: Fiction, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction / Size: 108 pages / Free from 25 February 2020   Rating: 3.90 / 5 9 reviews

Fesarius: The Semnorians by JOHN ADAMS

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Genre: Science Fiction & Fantasy, Hard Science Fiction, Military / Size: Unknown / Free from 25 February 2020   Rating: 5.00 / 5 7 reviews

The Chaos Trilogy: Better Life Through ACME by Jim Hamilton

The Chaos Trilogy is a story about the past, present, and future of humanity as it struggles to rise above its natural proclivity for self-destruction. From the dawn of the Sumerian Empire to the sunset of the Shoomaran Empire, this is the tale of how it finally succeeds.The Chaos Machine:...

Genre: Fiction, Science Fiction & Fantasy, Science Fiction, First Contact, Genetic Engineering, Hard Science Fiction / Size: Unknown / Free from 25 February 2020   Rating: 5.00 / 5 3 reviews

Move Forward One : Origins by Bruce Polky

How do two young women become the most important humans in history?Bess is training to be the first human on Mars, fighting other hopefuls, the establishment, and her father who thinks she should be home starting a family.Iylsa wants to get away from an abusive past, and Mars is about as f...

Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: 136 pages / Free from 25 February 2020   Rating: 5.00 / 5 2 reviews

Life Sauce & Other Tales: 4 Starships & Apocalypse Tales by Andrew McGregor

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Genre: Science Fiction & Fantasy, Colonisation, Galactic Empire, Hard Science Fiction, Military / Size: 33 pages / Free from 25 February 2020  

A Curious Alliance by Patrick Green

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Genre: Fiction, Science Fiction & Fantasy, Science Fiction, First Contact, Hard Science Fiction, Space Exploration / Size: 2.48 mb / Free from 25 February 2020  

A Child Of Our Time by William Bowden

An eminent Psychologist is drafted in to investigate a mysterious Artificial Intelligence, discovered in the laboratories of a Failed Corporation, and coveted by a powerful General in the Pentagon.

Through earning its trust the Psychologist forms a deep bond with the shy and s...

Genre: Crime, Thriller & Mystery, Thrillers, Suspense, Fiction, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction / Size: 109 pages / Free from 25 February 2020   Rating: 4.00 / 5 4 reviews

Bawdy Double (Galactic Adventures Book 1) by Scott Michael Decker

The Premier's adult daughter begins behaving with an utter absence of wherewithal and insight. An Admiral's dreamboat son engages in five years of profligate behavior after his sterling, top-of-his-class Academy graduation.A doctor called in to examine both scions determines they're mutacl...

Genre: Fiction, Science Fiction & Fantasy, Science Fiction, Genetic Engineering, Hard Science Fiction / Size: 247 pages / Free from 25 February 2020   Rating: 4.00 / 5 4 reviews

A Glimpse of Reality: A Juvenile Queen Bee Playing Games With Your Reality by Simon Hadman

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Genre: Science Fiction & Fantasy, Fantasy, Science Fiction, Alternative History, Hard Science Fiction / Size: 40 pages / Free from 25 February 2020  

LANGUAGE FROM ANOTHER WORLD (PARALLEL WORLDS Book 3) by Salinas Segura, Luis Alberto

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Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: Unknown / Free from 25 February 2020  

Revelations: Rise of the Inquisitor by R. E. Graham

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Genre: Science Fiction & Fantasy, Hard Science Fiction, Metaphysical & Visionary, Military, Space Opera / Size: 380 pages / Free from 24 February 2020   Rating: 4.40 / 5 5 reviews

Clotho by Christopher Keith

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Genre: Crime, Thriller & Mystery, Suspense, Science Fiction & Fantasy, Hard Science Fiction, Time Travel / Size: 405 pages / Free from 24 February 2020   Rating: 5.00 / 5 1 review

The Five-Minute Writing Prompt Journal: 300 Prompts to Cultivate Confidence and Personal Writing by Kean Hong Publishing

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Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: 250 pages / Free from 24 February 2020  

300 Writing Prompts: A Self-Exploration & Self-Help Journal by Kean Hong Publishing

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Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: 250 pages / Free from 24 February 2020  

The Jericho Singularity by Joel Gerard

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Genre: Crime, Thriller & Mystery, Mystery, Fiction, Action & Adventure, Science Fiction & Fantasy, Science Fiction, Adventure, First Contact, Hard Science Fiction / Size: 650 pages / Free from 24 February 2020   Rating: 3.50 / 5 2 reviews

Dead Red: A Sci-Fi Horror Novel by Matthew Buza

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Genre: Fiction, Horror, Science Fiction & Fantasy, Science Fiction, Colonisation, Hard Science Fiction / Size: 177 pages / Free from 24 February 2020   Rating: 2.50 / 5 2 reviews

Alpha Centauri: Humans Transcend . . . Humans Destroy . . . Humans . . . by K. Anderson Yancy

Earth’s first interstellar mission arrives at the exoplanet, Alpha Centauri Bb, believing it to be uninhabitable to discover the joys and horrors of near light speed travel.

*** FREE Audiobook Companion Download link is at the very end of the e-book following Audiobooks for ...

Genre: Children's eBooks, Fiction, Science Fiction & Fantasy, Science Fiction, Literature & Fiction, Hard Science Fiction, Space Exploration, Time Travel / Size: 28 pages / Free from 24 February 2020  

Shattered Nine: A Sci-Fi Thriller by C.M. Bacon

Secrets kill. Perfection destroys.∞Near Halti Fell, Northern Finland, the last of humanity has survived four hundred years in a series of crumbling habitats built to last fifty. Outside, the Earth is an irradiated wasteland of sand and desolate cities known as the scour. In the scour, no...

Genre: Science Fiction & Fantasy, Dystopian, Genetic Engineering, Hard Science Fiction, Post-Apocalyptic / Size: 250 pages / Free from 24 February 2020   Rating: 4.40 / 5 5 reviews

Tetrastatum: A Time Travel Thriller by Dr. Richard

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Genre: Nonfiction, Politics & Social Sciences, Philosophy, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction / Size: 300 pages / Free from 24 February 2020   Rating: 4.20 / 5 4 reviews

Wrath Rage 3: After The Knights of Wrath defeat The Deathrain family they had learn a war was coming to the planet (Wrath Rage Saga) by Xavier Jones

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Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: 84 pages / Free from 24 February 2020  

Mass Are Squared: A Science Fiction Tree, Short Story by Brian Garrison

It ought to be a simple experiment, except it's not working, and maybe that's a good thing.oo 8 ooThis is a self-contained, science fiction, short story....

Genre: Fiction, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction, Teen & Young Adult / Size: 17 pages / Free from 24 February 2020   Rating: 5.00 / 5 5 reviews

Prophet of the Godseed: A Novel of Time Dilation and Singularity (Deep Time Book 1) by David V. Stewart

When you travel between worlds, time slows. In the depths of deep time, travelers become ancient. They become gods.Alone, Padalmo walks through the eternally sunlit desert of Terranostra. He prays for the return of the Seeders, the race of gods who instilled all worlds with life, and that ...

Genre: Fiction, Science Fiction & Fantasy, Science Fiction, Colonisation, Galactic Empire, Hard Science Fiction, Military, Space Exploration, Space Opera, Time Travel, Teen & Young Adult / Size: 148 pages / Free from 24 February 2020   Rating: 3.90 / 5 4 reviews

Oasis (The Last Humans Book 1) by Dima Zales

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Genre: Crime, Thriller & Mystery, Thrillers, Science Fiction & Fantasy, Fantasy, Fiction, Action & Adventure, Romance, Science Fiction, Adventure, Superhero, Cyberpunk, Dystopian, Galactic Empire, Genetic Engineering, Hard Science Fiction, Metaphysical & Visionary, Post-Apocalyptic, Space Exploration, TV, Movie, Video Game Adaptations, Teen & Young Adult, Literature & Fiction, Mysteries & Thrillers / Size: 370 pages / Free from 24 February 2020   Rating: 3.70 / 5 4 reviews

Past the Edge: and Other Stories by S. J. Honour

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Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: Unknown / Free from 24 February 2020  

Terror Form (Centaurean Tribes Book 2) by Martin D Birch

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Genre: Science Fiction & Fantasy, Hard Science Fiction, Space Exploration / Size: 374 pages / Free from 23 February 2020   Rating: 5.00 / 5 5 reviews

Denizen 43 (Panopticon Book 3) by A.E. Currie

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Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: 244 pages / Free from 23 February 2020   Rating: 4.80 / 5 5 reviews

SODIUM Harbinger: (Book 1) by Stephen Arseneault

In 1957, a group of wilderness adventurers are confronted with the unexpected. They are forced to defend themselves against an unworldly enemy. Will man's first encounter with aliens force them to run or will they stand and fight? Follow along in this first thriller in the SODIUM series as...

Genre: Science Fiction & Fantasy, Fantasy, Fiction, Action & Adventure, Science Fiction, Adventure, Superhero, Alien Invasion, Colonisation, Cyberpunk, First Contact, Galactic Empire, Genetic Engineering, Hard Science Fiction, Military, Post-Apocalyptic, Space Exploration, Teen & Young Adult / Size: 248 pages / Free from 23 February 2020   Rating: 3.80 / 5 4 reviews

Testament: The books of Genaro by C.A. Hill

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Genre: Science Fiction & Fantasy, Hard Science Fiction / Size: 375 pages / Free from 23 February 2020  

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