[rbruce1314]

I'm confused as to Calibre's workings when it comes to pdf files. Most of the time it simply produces an epub text file, with images as appropriate.

With some books occasionally though, it simply takes the pdf pages and converts them to png image files, ending up effectively with what is a 'pdf book in an epub cover'.

I've looked at the settings and can't find anything obvious I've missed so I'm puzzled - from my point of view the conversion just to png files is rather less than helpful: they might as well be left as they were.

I presume this is something simple - please can someone enlighten me?

Thanks