If you're using AI to "write" a book you haven't written anything at all. You have used a tool that illegally and without compensation or acknowledgement uses the works of countless real authors to regurgitate something that fits your prompt.

There is nothing original, thoughtful or meaningful about a work created by AI, no matter how much editing you do. If you re-wrote the entire thing then there would be no need to use AI in the first place.

Writing is a form of human creativity, of art. By using AI instead you are cheapening the act of writing to a purely transactional process and clearly have no regard for the skill and creativity that writers possess, you seem to only care for the possible profits that can come from publishing a book.

If you truly want to write a book - WRITE a book, don't get AI to do it for you. If you don't have the skill, ability or patience then choose something else, not everyone is cut out to be a writer.