Recently it was announced that after two hundred and forty four years in print the Encyclopaedia Britannica would no longer be available in book form once this final edition has been printed.
It is easy to blame the internet for the printed works demise, but books in general are still selling well and therefore book stores are too. However, certain books such as an Encyclopaedia and other reference material are suffering due to cost and size etc.
In this graphic put together by the Open Site, it is clear to see how sites like Wikipedia have been having an effect on the printed work, but has been enough to drive the printed version out of business, decide for yourself.
Source [Fork Party]