On May 25 and May 27, the CERL Working group for book bindings will arrange two online events dedicated to different aspects of historical book bindings. The working group’s overall objective is to promote the interest for and the knowledge of all aspects of historical book bindings. One major issue is to complement traditional library cataloguing of book bindings with more images, on-line resources and information as traditional library cataloguing is often not sufficient for discovery of this highly interesting heritage resource.