[HarryT]

Originally Posted by cybmole

thanks again, so If I abstain from using any PDF sources, can I just forget all about header & footer removal, & preprocessing & not have to learn regex at all ?

Pretty much, yes.

If I use that route, but then use Kindle to delete finished books, I'm left with empty subfolders on Kindle but I guess it's safe to delete those via windows.

I'm a little surprised that you're seeing subfolders. What circumstances are you seeing them in?

I'm reluctant to move, copy, delete stuff on the Kindle drive as it appears in winodws, as I don't know how Kindle firmware keeps track of stuff.

You can freely copy and delete things from the "documents" folder - that's where all your books go. Don't touch anything else. The key thing to remember is to never, NEVER, unplug the USB cable without doing a "Safely Remove Hardware" in Windows first.