The access code you need to enter is not the ISBN code.

You will find your access code on the internal part of the cover. It is a 20-character code that gives access to the digital book and all its associated resources.

You need to “scratch the grey field/rectangle” to see the licence/access code as shown here below on the screenshot.

To activate the content you will have to log in campus.difusion.com  and click on the blue "+ Add a code" button. (or the "+ Add code" button located on the content tab if you have already added some content) and introduce your 20-character access code.

If you already have products on your dashboard and wish to add more codes, you will have to click on the Contents tab, then on the blue + Add code button, and enter the code.