This metadata is not required, but useful for resellers who sell both the digital and the paper format. It also allows, on external sites featuring our "flipbook" module. for the browsing of an excerpt online, even from the paper format screen for a publication, 

  1. Go to the Metadata > Formats section, to the Paper tab
  2. Select ISBN and enter a valid 13-digit ISBN
  3. Enter the publication date
  4. Click Save