Anybody wishing to look at or research the literature on flies and fly-fishing can find many very good and interesting books on the matter here;
These are all completely free downloads
http://www.archive.org/search.php?query=subject%3A"Flies%2C%20Artificial"
http://www.archive.org/search.php?query=fly%20fishing%20AND%20mediatype%3Atexts
as, among other things, PDF files, and complete texts if desired.
For viewing ( or indeed printing) PDF files I recommend this software, ( also a free download);
http://www.docu-track.com/home/prod_user/PDF-XChange_Tools/pdfx_viewer/
Of course, this is not all the literature, and my large personal library of fishing books notwithstanding, I don’t have it all either, But for many years I had access to a couple of major libraries, and some private collections, so I have at least seen and read all the books listed in the Bibliotheca Piscatoria, among many others, some in French and German as well.
http://www.archive.org/search.php?query=piscatoria
I also have a number of specialist books and manuscripts on the history and development of angling with flies, the flies themselves, and of course a large number of ( but by no means all) modern books.
So basically, one might assume that I am fairly well informed on the matter. This is also why I tend to refrain from some discussions, as there is not really much point in arguing about it.
TL
MC