Hey, I just watched this video and it was really interesting. The audio quality is not so good but the content is great. In short, the interviewee Jacob started creating books for kindle. He did not create the books himself but outsourced them for about 300 $. In the beginning he made just a few bucks per months. Now with about 15 books he is making over 2.500 dollars and his earnings are increasing every month. This is a really interesting interview.