When a book is deleted from a Kobo device using the calibre, the following is done:
- Update the database to remove appropriate rows from tables: content, content_settings, ShelfContent, ratings, Activity, shortcover_page, content_keys.
- The cover images are deleted and the folder is removed if it is empty.
- The book is deleted and the folder is removed if it is empty.
From my tests, this is the same as when the device does the deleting except the empty folders are not removed.
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