If you want to see what some people have designed, try out this really cool site for novel building which includes related artwork for the book. He started this before chatgpt existed.
https://ainspiration.netlify.app/
He is allowing GPT4 right now for testing purposes which will make for much better and coherent novel, try it out if you would like to experience GPT4 writing for yourself and have fun with a really cool and novel idea.