I still haven't gotten an email or seen a banner, but when I clicked on my own link

, I have the $6 on $25 too. Cool, and thanks to @issybird for noticing that Amazon is running it again!
I'll keep an eye out for a PRH offer in my email too. I don't
think the two offers are linked, but who knows - they do seem to pop up at roughly the same time. But the last time, the very small (5 or 6 IMS) selection of books by a random author I had only ever bought one title from, and didn't like all that much, was so poor that the PRH offer was worthless to me. So I'm not holding my breath!