Just got an email from Mighty River saying that my order would be delivered, perhaps, by Saturday.
For a moment I thought it was one of those dodgy scam emails, so I didn't immediately click on it to see what they were blethering about, but went into the River website to find that it was a book that I'd ordered a while ago, had completely forgotten about, which had finally come into stock and that they would be sending out shortly!
So there!
Update: Captain Slog 20231116.21:49
Got an email yesterday at 9pm saying that the book would be with me on Friday. So far, so good.
Got an email mid-day today that the book would be with me between 3pm and 5pm today.
4pm Amazon bod arrived, rang the bell and didn't run away!
Result!!!