If there is a problem with the activation code you entered, you will see the following error message:
Make sure that you enter the complete code, exactly as it is printed in your book
Don’t add any spaces, but do include hyphens if they’re part of the code
For example: ABCD-1234-EFGH
Tip: There is always a URL below your activation code in your book. This is the web page where your code can be activated.
If problems continue, please contact us with the following information:
A photo of the activation code printed on the book or card
A photo of the ISBN printed on the book (you can find this number on the back cover, next to the bar code. It will start with 978)
Proof of purchase (receipt/invoice)
Your email address