Some audio book producing companies have now begun to digitally produce their books in mp3 format, whereby a 12-CD book is now available on one disc, but it needs a specific player and I would need to know what to look for when buying. Would it be an mp3 disc player or a digital disc player or what?...after all, it's still a CD shaped disc, but the specifics are necessary to buy the right thing. Ta Muchly for help gratefully received.