Question about online UK booksellers

[Kelley]

Has anyone else heard this?:  I've tried ordering the four-book boxed 
set from both WHSmiths and bol.com, and both have told me it's 
currently not in print, but they're both expecting it by the end of 
the month.  I'm sure there's some sensible reason, and of course, I 
know nothing about the publishing business.  Just seems odd to me 
that a 'set' would go out of print.  BTW, the links I have for UK 
booksellers I got from Nick.  What's happened to him?  I can't recall 
seeing any sign of him in the longest time...

Kelley