(hello Susan *smile*)...

from OUR viewpoint, there is lots of demand for these volumes and hundreds of people would likely buy a copy immediately, but from a publisher viewpoint hundreds..even several thousand...would not justify it. I suspect that they are expecting the material to become 'available' on the WWW/internet before they could make a profit.

The easiest way to get it, and probably cheaper, is to borrow a set and xerox until you drop!..

(Yes, some of us are acquainted with several sets)