I wondered about that as well. I found this:
Due to copyright restrictions, certain Kindle Titles are not available everywhere. If the country or region displayed is incorrect, you may change it at http://www.amazon.com/manageyourkindle.
the “cover” of the Asta’s book that i read this summer was different than that shown there, but i still don’t get it. I read that the book was released in the US as “ann’s book” but was “asta’s book” in england. However, what i downloaded to my ipad was def Asta’s book.