I hope this isn't cluttering up this thread, but I just want to express my gratitude for the info that has been provided here, in fact I can't thank you enough

I have loads of tags on my books in Calibre, but these were getting made into collections on my Sony which were an awful sprawling mess as a result, plus I couldn't easily see what books were in what order in a series.
But thanks to you guys and gals I finally have it set up just the way I like it, woohoo