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In days gone by you would be forgiven for thinking Science Fiction was the domain of nerds, but not anymore – it's incredibly cool to be a fan of science fiction books! Especially when they are free ebooks! It is great way to escape daily life and provoke thinking about how a future could look.

Check out our selection of the best sci fi books here on obooko and download a novel that will transport you into the future and stretch your imagination to what is possible. Maybe aliens and robot overlords are not so far away from being a real possibility!

If you don't know which book to read first, try Star Dragon by Mike Brotherton, which is currently the most downloaded sci fi book on obooko.

Science fiction books are an amazing way to escape into the future or travel to a distant planet with advanced alien civilisations and technology only limited by the imagination of the author. Some books will take a very scientific approach to what could really be possible in the future whilst others may be more loose with their application of science as we know it today. Whatever the case, it makes for some awesome storylines.

With sci fi books you will be taken to a place where science has advanced or is different to what we know today. In this backdrop there might be stories of adventure or war or discovering new planets and new species. Maybe humans have colonised Mars and are fighting an evil alien race or the hero has to negotiate the politics of a world 1000 years in the future from now. Maybe the machines have taken over and enslaved humanity and the last free people have to fight for the survival of the human race.

The science fiction genre has been popular since the late 19th century when authors like Jules Verne (From the Earth to the Moon) and H. G. Wells (War of the Worlds) published science fiction works that have become classics. Then, novels grabbed the attention of the nations as new and strange ideas were put down on paper.

In the early 20th century science fiction short stories became popular in the USA due to the publishing of pulp magazines (magazine collections of short stories). These would keep teenagers enthralled with amazing tales of the future and alien worlds.

Later, writers like Isaac Asimov and Arthur C Clark emerged with more science based novels. Isaac Asimov wrote many science fiction novels and hundreds of science fiction short stories. His Robot series contained the three laws of robotics which are used in the real world today.

Please reward our fantastic authors by leaving a star-rating and some feedback for each of the free science fiction books you download from obooko.

Science Fiction Books free

Earliest published books appear first. Newest books last. Latest books on last page.
Star Dragon by Mike Brotherton
Starfish by Peter Watts
Maelstrom by Peter Watts
Behemoth by Peter Watts
Blindsight by Peter Watts
Deviations: Covenant by Elissa Malcohn
Deviations: Appetite by Elissa Malcohn
Deviations-Destiny by Elissa Malcohn
Deviations-Bloodlines by Elissa Malcohn
Telzodo by Elissa Malcohn
Deviations: Second Covenant by Elissa Malcohn
Neptune Crossing by Jeffrey A. Carver
After Life by Simon Funk
The Unearthing by Steve Karmazenuk
The Onuissance Cells by Steve Jordan
Postsingular by Rudy Rucker
Under a Violet Sky by Graeme Winton
From the Hands of Hostile Gods by Darren R. Hawkins
Signature by Ron Sanders
Faction Paradox: Newton's Sleep by Daniel O'Mahony
Entropy of Imagination By Ryan Somma
Admirals's Ghost by N. B. Vanyoos
This Blue Ball by Wayne Miller
Hardshellz. By Morris Kenyon
Bettkasten by J. Albert Rorabacher
Beautiful Red by M. Darusha Wehm
His Robot Girlfriend by Wesley Allison
Makers by Cory Doctorow
Zero-Option by Lindsay H. F. Brambles
Dieselpunk ePulp Showcase 2 - John Picha

Arthur C Clark is best known for his sci fi book, 2001: A Space Odyssey and the subsequent novels. Some of the science predicted in these novels came true decades after they were written because the author took great effort to base his predictions on real science.

Science fiction has become so popular in TV and cinema today that this has the knock on effect of popularizing the overall genre. Today, there are huge selections of science fiction books and our real world technologies fuel the ideas for what a future may hold. It is a massive genre that continues to grow and grow.