No problem at all, I knew nothing about the code, if it works that's great, makes no difference to the authors.

Cheers

: Very sorry if this cuts into the authors, I assumed it was on the
: publisher end. When I checked out it was displayed on the top as
: an option. I was ordering either way as well, it was an added
: bonus. Maybe its because I already bought the other books...not
: sure why. But if its inappropriate to share please delete the
: post.