I have been using Marvin 3 for about a year maybe a little more, I like the ability to change the covers and the metadata. I do not know why I wasn't aware of Calibre and it's features (Plus its use on my pc). I know that I knew about it on the iPad but I thought it was just another alternative to iBooks/Marvin and so on. But in the last week I have seen the light. I have also been searching for a feature. I have manually put in tags and such on Marvin on the iPad. Is there a way to get this information that I have in Marvin into Calibre on my PC. Sort of a backwards export. I've looked and I can't really find what I'm looking for at least in the words that I have to describe what I need. Thank You!