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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

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...

Size: Unknown

Rating: 5.00 / 5
5 reviews

Free from 25 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, First Contact, Hard Science Fiction

The God Machine

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...

Size: 15 pages

Rating: 4.10 / 5
6 reviews

Free from 25 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, Cyberpunk, Dystopian, Hard Science Fiction, Steampunk, Teen & Young Adult

Alder's World: Part One: Mass 17

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...

Size: 108 pages

Rating: 3.90 / 5
9 reviews

Free from 25 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction

Fesarius: The Semnorians

JOHN ADAMS

...

Size: Unknown

Rating: 5.00 / 5
7 reviews

Free from 25 February 2020

Science Fiction & Fantasy, Hard Science Fiction, Military

The Chaos Trilogy: Better Life Through ACME

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:...

Size: Unknown

Rating: 5.00 / 5
3 reviews

Free from 25 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, First Contact, Genetic Engineering, Hard Science Fiction

Move Forward One : Origins

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...

Size: 136 pages

Rating: 5.00 / 5
2 reviews

Free from 25 February 2020

Science Fiction & Fantasy, Hard Science Fiction

Life Sauce & Other Tales: 4 Starships & Apocalypse Tales

Andrew McGregor

...

Size: 33 pages

Free from 25 February 2020

Science Fiction & Fantasy, Colonisation, Galactic Empire, Hard Science Fiction, Military

A Curious Alliance

Patrick Green

...

Size: 2.48 mb

Free from 25 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, First Contact, Hard Science Fiction, Space Exploration

A Child Of Our Time

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...

Size: 109 pages

Rating: 4.00 / 5
4 reviews

Free from 25 February 2020

Crime, Thriller & Mystery, Thrillers, Suspense, Fiction, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction

Bawdy Double (Galactic Adventures Book 1)

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...

Size: 247 pages

Rating: 4.00 / 5
4 reviews

Free from 25 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, Genetic Engineering, Hard Science Fiction

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

Simon Hadman

...

Size: 40 pages

Free from 25 February 2020

Science Fiction & Fantasy, Fantasy, Science Fiction, Alternative History, Hard Science Fiction

LANGUAGE FROM ANOTHER WORLD (PARALLEL WORLDS Book 3)

Salinas Segura, Luis Alberto

...

Size: Unknown

Free from 25 February 2020

Science Fiction & Fantasy, Hard Science Fiction

Revelations: Rise of the Inquisitor

R. E. Graham

...

Size: 380 pages

Rating: 4.40 / 5
5 reviews

Free from 24 February 2020

Science Fiction & Fantasy, Hard Science Fiction, Metaphysical & Visionary, Military, Space Opera

Clotho

Christopher Keith

...

Size: 405 pages

Rating: 5.00 / 5
1 review

Free from 24 February 2020

Crime, Thriller & Mystery, Suspense, Science Fiction & Fantasy, Hard Science Fiction, Time Travel

The Five-Minute Writing Prompt Journal: 300 Prompts to Cultivate Confidence and Personal Writing

Kean Hong Publishing

...

Size: 250 pages

Free from 24 February 2020

Science Fiction & Fantasy, Hard Science Fiction

300 Writing Prompts: A Self-Exploration & Self-Help Journal

Kean Hong Publishing

...

Size: 250 pages

Free from 24 February 2020

Science Fiction & Fantasy, Hard Science Fiction

The Jericho Singularity

Joel Gerard

...

Size: 650 pages

Rating: 3.50 / 5
2 reviews

Free from 24 February 2020

Crime, Thriller & Mystery, Mystery, Fiction, Action & Adventure, Science Fiction & Fantasy, Science Fiction, Adventure, First Contact, Hard Science Fiction

Dead Red: A Sci-Fi Horror Novel

Matthew Buza

...

Size: 177 pages

Rating: 2.50 / 5
2 reviews

Free from 24 February 2020

Fiction, Horror, Science Fiction & Fantasy, Science Fiction, Colonisation, Hard Science Fiction

Alpha Centauri: Humans Transcend . . . Humans Destroy . . . Humans . . .

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 ...

Size: 28 pages

Free from 24 February 2020

Children's eBooks, Fiction, Science Fiction & Fantasy, Science Fiction, Literature & Fiction, Hard Science Fiction, Space Exploration, Time Travel

Shattered Nine: A Sci-Fi Thriller

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...

Size: 250 pages

Rating: 4.40 / 5
5 reviews

Free from 24 February 2020

Science Fiction & Fantasy, Dystopian, Genetic Engineering, Hard Science Fiction, Post-Apocalyptic

Tetrastatum: A Time Travel Thriller

Dr. Richard

...

Size: 300 pages

Rating: 4.20 / 5
4 reviews

Free from 24 February 2020

Nonfiction, Politics & Social Sciences, Philosophy, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction

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)

Xavier Jones

...

Size: 84 pages

Free from 24 February 2020

Science Fiction & Fantasy, Hard Science Fiction

Mass Are Squared: A Science Fiction Tree, Short Story

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....

Size: 17 pages

Rating: 5.00 / 5
5 reviews

Free from 24 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, Hard Science Fiction, Teen & Young Adult

Prophet of the Godseed: A Novel of Time Dilation and Singularity (Deep Time Book 1)

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 ...

Size: 148 pages

Rating: 3.90 / 5
4 reviews

Free from 24 February 2020

Fiction, Science Fiction & Fantasy, Science Fiction, Colonisation, Galactic Empire, Hard Science Fiction, Military, Space Exploration, Space Opera, Time Travel, Teen & Young Adult

Oasis (The Last Humans Book 1)

Dima Zales

...

Size: 370 pages

Rating: 3.70 / 5
4 reviews

Free from 24 February 2020

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

Past the Edge: and Other Stories

S. J. Honour

...

Size: Unknown

Free from 24 February 2020

Science Fiction & Fantasy, Hard Science Fiction

Terror Form (Centaurean Tribes Book 2)

Martin D Birch

...

Size: 374 pages

Rating: 5.00 / 5
5 reviews

Free from 23 February 2020

Science Fiction & Fantasy, Hard Science Fiction, Space Exploration

Denizen 43 (Panopticon Book 3)

A.E. Currie

...

Size: 244 pages

Rating: 4.80 / 5
5 reviews

Free from 23 February 2020

Science Fiction & Fantasy, Hard Science Fiction

SODIUM Harbinger: (Book 1)

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...

Size: 248 pages

Rating: 3.80 / 5
4 reviews

Free from 23 February 2020

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

Testament: The books of Genaro

C.A. Hill

...

Size: 375 pages

Free from 23 February 2020

Science Fiction & Fantasy, Hard Science Fiction

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