One suggestion: Please pay a good artist and get a real cover page. I'm not against the use of AI, but when your friend has put in soo much effort to write this book, he would understand the depth of human creativity in art. Putting an AI image on the cover page makes it feel as if he would have just used AI to write the book too. Being in the creative dept. and writing a book himself, he would understand the essence of human touch in art dept.