At least 16 hidden messages have been discovered inside books at Western University in Canada and feature sets of unusual symbols with an accompanying item such as a gem or feather that seems to relate to the code.

Each code is printed on a piece of plain white paper which also boasts an image of an everyday household item like a cardboard box or a table.

The back of the notes also make reference to a blog, which has been viewed nearly 50,000 times, that is completely blank except for its title DBW Stack.

The majority of the notes have been found between pages 16-17 of books at the university’s Weldon library and the font that is used is believed to be a custom design.

Via Metro for the full article.