@
Orwellian - when you add a book to a library, the built in
timestamp/Date column is set to the current date & time. So if you add the book to the library on the day you download (create) the file it will be the same as the file system Date created.
But if that doesn't suit, perhaps an option could be added to the
GetFileName optional plug-in. Currently it can set a custom column to the file path or file name. If you want to have an extra option for the file's create (modified ?) date, then I suggest you add a post to the GetfileName plugin thread with a direct request for the enhancement.
BR