There are total of 2.6 million libraries reported in year 2020. Each library must buy 5 books for each book title. Hence, when you are a book author, you are a tiny millionaire for sure. J. K. Rowling is a billion-dollar reward book author of book title: "Harry Potter". Enjoy reading and writing! Bravo, our potential billion-dollar reward book author!

Figure 1: How many libraries are there? Click on the photo to enlarge!

Click to find out more about J. K. Rowling, https://en.wikipedia.org/wiki/J._K._Rowling!

I am Hui-Shin Wong (H.S. Wong or HS Wong), Wong Hui Shin or Shyan H. Wong.