By CLEMENT ADAM:
"Travelers of the Catalan Government Railways (Ferrocarrils de la Generalitat de Catalunya) will have plenty to read over the coming months as the trains are turned into virtual libraries where 40 books are displayed on posters. After scanning a book’s QR code, travelers are enabled to read the first chapter of every book.
Read more: http://popupcity.net/2012/06/bibliotren-transforms-trains-into-virtual-libraries/#ixzz1xSw05t5D"
Great use of QR codes for libraries!