Thanks so much, everybody.
The book I bought was Secure Mobi format - is that DRM then?
Of course the ONE format I shouldn't have chosen would be the one I did blunder into!
So all the other formats should be useable? And what about this PID thing? I gather that's something Jetbook doesn't have?
Thanks again for all your help. I've really learned so much reading here the last few months.
