Mick,

I tried Calibre and was somewhat underwhelmed by it so I removed it.

I might try the Amazon conversion service with a text only Word file and see how that does as my pdfs were generated from Open Office documents anyway.

The archive.org files I have seem to be one continuous "page" so one song runs into another with no proper break between them and the indexing is poor. With one or two of them, I have managed to find songs I was particularly looking for and added bookmarks so I can find them again.