Well, 'jadis graphic novel' could cover a wide range of topics. It could be a story set in a historical period, with the art in the graphic novel helping to bring that era to life. Maybe it has elements of fantasy, like magic or mythical creatures. It could also be a character - driven story, focusing on the relationships and growth of the individuals in the story.
Online platforms like Amazon or eBay could be good places to start. They usually have a large selection of books, including graphic novels. Just search for 'jadis graphic novel' on their websites.
Yes, there are likely some non - adult fanfics out there. You can start by looking on fanfic - specific websites like Archive of Our Own. Many authors create stories that focus on the relationship between Edmund and Jadis in a more platonic or adventure - based context, rather than delving into adult themes.
One idea could be that Edmund, instead of being tempted by Jadis' evil, tries to reform her. He could use his own experiences of redemption in Narnia to show her a different path.