In fact, if you'd like, a whole chunk of such fiction has been made into comics, most of which you can read online free-of-cost at
http://www.bigheadpress.com/ I highly recommend Escape From Terra. Newbies to libertarian thought should definitely start at the start, but you can jump in at the start of any storyline.
And how is this not a fantasy-world?
The technical term is Science-Fiction. You know, the field of writing that was once the sole domain of moon landings, rocket ships, cell phones, communication satellites, extra-solar planets...
Besides, you specifically said that no one would read it. People do.