My novella, The Merchant of Mars, is available on Amazon in paperback (list price of $10) and as a Kindle ebook ($3). Just click this cover:
Here is what the story is about.
The head of NASA convinces the President that space exploration should be done by private industry, and the United States government declares, “The first person to land on Mars, live there a year, and return alive owns the whole Red Planet.” Capitalists compete to win the greatest race in history. Environmentalists plot to make them all fail.
For my article about the political idea used in the story, see Mars: Who Should Own It.