I purchased a Kindle "book" from this person and was dismayed to have purchased a two-page essay. I left a one-star review, and then checked to see what else she had posted. In May 2011, it appears she posted over 1000 Kindle "books" on a huge variety of topics. These range from short essays to books.
My gut reaction is that she's "publishing" non-digital content -- but I don't have proof of that. Much of it is recent and very definitely not in public domain. I hope you guys will check out her list and see if you recognize anything there. If she is publishing content she doesn't have rights to, I hope she is stopped.
I filed a complaint with Amazon.