I discussed "print on demand" technology. This CNN video shows how it works:
http://www.cnn.com/video/#/video/tech/2009/09/17/eod.espresso.bookmachine.cnn Print on demand books are now offered Lulu.com and others. As you see in this video, you will soon be able to purchase print on demand books in bookstores. I expect that in 20 years, all books will be printed on demand. One of the biggest expenses in publishing is from printing too many copies that have to be scrapped. With this method, books do not have to be shipped anywhere and they never print even one unsold copy. - Jed
