Style Switch-Up - Art Nouveau Harry Potter I solemnly swear that I am up to no good. I reimagined JK Rowling's Harry Potter book covers in Art Nouveau. I picked Art Nouveau, because the style focuses on natural forms such as plants, animals, and curved lines. These characteristics also lend itself well to themes and motifs in the Harry Potter stories. I enjoyed hand illustrating the covers and added the gold leaf embossment to make it feel unique and add a natural material to the design. All was well.