Quote:
Originally Posted by JayLaFunk
I would like to add a small text file(Notepad++) to each author folder in my Calibre library, would this be ok to do and not corrupt my library...
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there is corrupt and there is
corrupt 
Technically, Calibre will complain when you run the
Check Library function and it finds files that are not under its control
I think, I see why you want this.
Unfortunately Custom columns are not available for any table other than the Books table (deep inside Metadata.db)
I can see a usefulness for a right-click,
context Pop-Out (I made the name up, if someone knows the correct name. I will edit this) Information on a selected field value:
Author - Bio, Pseudonyms
Series -Synopsis, Character Bio's, Related series
Publishers - Other Imprints, Locations
The data is attached to the proper internal table and record, not just always to the Book (title)