A non-profit group called Project Pingeborg is working to promote reading, music and art among the population of Klagenfurt by turning their city into a library. This project is still in the early stages, but what they’ve done so far is to place 100 QR codes around the city:

The QR codes each lead to a particular ebook or mp3, all of which can be downloaded for free. According to Project Pingeborg, the mp3s are drawn from Librivox, the CC licensed audiobook project, while the ebooks are pulled from Project Gutenberg which now offers over 40 thousand titles, including around a thousand in German (according to Project Pingeborg).

Who is behind the project Ingeborg? 
The idea came to Georg Holzer and Bruno Hautzenberger after a few cool beers in the Klagenfurt Jazzkeller Kamot. The two wanted to do something with the NFC wireless technology. Klagenfurt – Literature – Bachmann Prize … all this led to a lengthy brainstorming creating pingeb.org.
Without the cooperation of many other (Kerstin Rosenzopf, Iris Wedenig, Verena Artinger or Daniel Gollner) would not have been possible.

Source: the-digital-reader.com and Project Pingeborg