I said it probably wouldn't hold delivery up for more than 24 hours, and already Amazon have the slightly revised edition of Book Five back on sale, now with altered spine font to make it consistent with Books 1-4. (Oliver, you can stop brushing your teeth now.)
But I'm not bothered about fonts and point sizes, you're saying? What about the content, you ask? Well, the new edition has attractive greyscale maps which are a big improvement on the pure black-&-white of the first four books.
And it also has the six pre-generated characters from the original 1996 Pan Macmillan edition - one of whom (see if you can guess) is Jamie's own all-time favourite player character from our roleplaying campaign.