Hello and welcome to the forums!
Calibre has several newspaper feeds "built in" (and they're free!), and folks are adding new links ("recipes") all of the time. It's not trivial to make your own new one, but it sure is an educational experience. I'd also recommend the
Calibre forum here.
Please be aware that there are some resource conflicts between the Sony ebook library and Calibre, so if you have two computers, It's best to segregate the installation of these two pieces of software.