This one is for people who want to work hard but make significant money online. Online learning courses have become very popular on the web, and you can find a lot of Youtube who starts selling courses in their field. It depends on the knowledge you have. If you have an extensive knowledge in Financial Education, then go and open a course. If you are a book bike rider, you can make a course about riding a bike and earn a significant passive income from that.
Try going to our post: 20 Sites That Will Pay You to Read Books: https://wellkeptwallet.com/get-paid-to-read-books/. Even though editing is not what this post is about, there are several companies that might do book editing such as Kirkus: https://www.kirkusreviews.com/editing-services/get-started/marketing/?utm_source=google&utm_medium=cpc&utm_term=%2Bbook%20%2Bediting&utm_campaign=Editorial-ES I hope this helps and good luck on your book!