[Phssthpok]

Is it possible to access the file date (or latest file date if there are multiple formats) for use as a column that I can sort on? I have "Modified" as a column, but if I delete one format from a book with multiple formats, the book shows up as having been modified. I want to keep track of which books I've added or edited recently; I don't want books were I delete unwanted formats to jump to the top of the list.