A new way to publish a book

My friend published a book on http://www.lulu.com/. It operates on an entirely new model, as follows:

1. The author puts up a soft copy of the book on the website.
2. The author decides on the royalty.
3. The price of the book is the printing charges plus the royalty
4. The buyer can order the book.
5. The book is printed based on demand and is mailed to the buyer
6. The unit cost is lower for a large print volume.
7. The author can request for the book to appear on several online bookstores.

This is a wonderful new way to publish a book. I will be publishing a book on Logic Quiz and on Logic 9 (Sudoku).

Lesson: The internet allows new way to do all types of business.