Has anyone else seen WorldCat.org? This is a site that tells you which libraries have the book you are looking for, and I think it could be quite useful.
Having said that, I am looking for a copy of Fonti documentarie per la storia degli scavi di Pompei, Ercolano, e Stabia, a cura degli Archivisti Napoletani (Naples 1979), and WorldCat.org told me that the nearest copies were in Michigan and at the Getty! I know there is a copy at the American Academy in Rome because I have used it. But I NEED a copy to be in the UK (does anyone know of one?!).