This is true! Oops. Thanks for alerting me. I’m going to amend the original post with the correct link, but for anyone who followed the link in my UK prog post this morning expecting Volume 12 and getting Volume 13 instead, the correct link is here.
PS—If you did grab Volume 13, I hadn’t yet changed all the tags or formatted everything, so it’ll be pretty wonky—the correct version will go up next week.