Catalogue update #6

It has been a while since I wrote about my struggle to catalogue my gaming pdfs mainly because for each breakthrough I make, another two setbacks present themselves.
I found a useful plug-in for Calibre that is able to extract the ISBN from an ebook and then I have been trying to use the Download Meta-data function look the information up on a number of book sites.
Where I’m having problems is the ISBN can often refer to another book as either the publisher has entered the wrong one or recycled an old one.
The latest struggle has come about in trying to export from Calibre into Book Collector, something that isn’t easy to do as all Book Collector wants to do is use ISBN, Publisher and Author and not the other summary data.
So I find myself stuck again, not quite at square one but getting closer to it; I suspect I need to roll a 6 to get the game started again.
Why am I bothering?
I’m doing this so I can share my gaming collection with my friends so they have an idea of books in my library using Book Collector’s cloud library and also to take advantage of Book Collector’s loan facility something that Calibre doesn’t have. If I wasn’t going to use either of these functions I would have kept everything in Calibre and managed it that way.