Wow, that was painful. Took me an hour. The instructions don't say HOW to scan a QR code so I registered on my computer. To register my copy of the book it asked when & where I bought it. I don't remember that, I have had it a year or more. I guessed, and then it asked a question on a page that doesn't exist for a recipe ingredient that doesn't exist for a recipe that doesn't exist in the entire book.
So, back to the phone. To scan a QR code you need an application on your phone. I don't know, maybe all phones come with such an app now. Mine didn't and I downloaded ShopSavvy when I got my phone so I tried that. It registered but of course asked for the scratch code. I entered it and the next result was 'error, page does not exist'.
So, I don't know if I successfully registered my copy or not but I think I have spent enough effort on this. Still, for that effort I expect the additional benefits of registration to include free food prepared in the Test Kitchen!
Hope this all helps someone.
...and now they want me to do math to post. I was told there would be no math.