They are talking about Marcel Proust on France Culture (http://www.franceculture.fr/) - and they are having a lot of fun, apparently. I only understand every fourth to fifth word, though. frère - marveilleux - Petit Robert - perdu - Michel Schneider... Not sure I get the gist. No wait, I really don't.
I've been vowing to refresh my former knowledge of the language for years - it will never happen, though. :)