I’m not sure if there is an “art” to writing about villains, but I do find that to write convincing and three-dimensional villains, one must be sympathetic to their plight.
What makes a villain a villain? I’ve always been a fascinated—and a little bit terrified—of villains, especially in fairytales. As a child, I couldn’t get enough of Snow White and the Seven Dwarfs even if the old witch sent me diving into our couch cushions to hide my eyes.