Thank you.
It is EPUB 2 (Adobe DRM), according to the Kobo website, but I shall look into the 'Modify CSS' via
https://www.mobileread.com/forums/sh...d.php?t=154371
It happens with all fonts. And it's when you go to change the font that you can really see how grey the book text is compared to the black used by Kobo as its system font. As I said, very daft idea to use grey text in an ebook.