I'm a little puzzled as to what you perceive the issue to be. You have seen italics in the demo books - they are just Mobipocket books, like any other. If they display italics, then so will any other book. If you really must check, however, then download my Mobi version of "Pride and Prejuduce". The title page, where it says "A novel in three volumes" has the "in three volumes" in italics.