...thinking harder...brain starting to hurt....
Logic path of patch:
Code:
-import book
-if duplicate title found
--compare author (if available)
--if same author
---compare series (if available)
---if same series
----compare series index (if available)
----if same index
----- This is a duplicate.
----- If "replace duplicate with same format" checked
------then delete older version
-default: keep both files