I am looking for something like Calibre that allows me to access and assign tags to existing pdf or other ebook files without having to modify/move/copy any of them, on Windows. This is because many of the files exist in torrent collections, which I would rather not modify, although I intend to clean them up gradually over time (by moving individual torrents) via other means.
Ideally, it should also be possible to move the files through the program, though this is not necessary.
