I finally have finished my short story Royal Pines Estates, and am now just waiting for the uploaded files to be approved for print before I send the electronic versions to Kindle.
Wait a minute, did I just say "print"? Yes, I know, and if I wanted to make my life easier, I could count this as the first book of the Challenge instead of the first short. But sending the book to print is just something I do whenever the formatted page count is at least 24 pages. There are some people who just don't like reading e-books, and there are other advantages to print. For more on my opinions about that, see this blog entry.
But at roughly 4000 words, this is definitely a short story. I'll post the link and the description, and also announce the time window when you can pick up a Kindle copy for free, as soon as the e-book is approved.