Here is a little sneak peak into the book Art of the Disney Princess
This really is a lovely book although not quite what I expected. I hoped it might have some character concept work for each princess, instead it is a collection of illustrations of each princess in various styles by lots of different artists.
Below are some photos of what is inside :) My favourites were the Art Nouveau versions of each of the princesses by Enrique Pita & Ed Irizarry. (The Jasmine illustration below. You can see more of these illustrations at this link.)