calibre + iPad = books duplicate to iTunes
I am using calibre with my Sony Reader and I have had no problems with it. However, I recently loaded some books on my father's iPad and I found that all of those books have been copied to my iTunes book folder. The result is me having the same books saved at 2 different places on my computer, one in the calibre library and one in the iTunes library.
Is there any way to stop this from happening? If I load a book on the iPad via calibre, I'd like it to stay there and not get copied to iTunes.