MarsX 2: A Novella
The three friends had finally gotten their childhood wish come true; they were on Mars.
Working for themselves, they chose their next goal: to build a space habitat to accommodate ten thousand and explore.
But the Earth AIs, which had previously ruled over the Earth, had other ideas.
MarsX2 is the second novella in a series of the Remembered Earth Universe and may also be read as a standalone. For more information, see the author's website.
Hard Science Fiction - Old School