@
kite - Most of my books are non fiction (2000+ books and 60,000 other). I don't use Dewey or US Library of Congress codes and I've never felt the need. I do search on Author and the Tags I assign (small set thereof and no imports).
However, I tend to use full text search more than I use metadata searching, I often add the search results to the library as a Book - so I can find it again
BR