https://medium.com/bottom-line-grind/archive/2018
https://medium.com/bottom-line-grind/ultimate-guide-how-to-sell-your-own-online-course-without-relying-on-marketplaces-that-steal-50-62d7d19572c5?source=collection_archive---------2---------------------
https://www.thebalancesmb.com/make-money-selling-ebooks-online-4122181