I've seen BookFinder, but haven't used it. Interesting--I'll play with it and see how it differs from some of the others, like ABE and Alibris. I just looked--I have BookFinder in my "favorites." Looks like it's time to go poke around and see what else I've forgotten I have in there!

Malcolm, that was the sort of search I did, using Google Advanced. It seemed that so many of the book sellers had combinations of books that the keywords weren't bringing any exclusivity to the search.

SRS