Although I haven't read any of Hugo's works, I saw the musical of Les Mesirables. I first saw it a couple of years ago in NY and LOVED it. I have seen many musicals and this one is definately my favorite.
It isn't playing in NY anymore, but I was in London recently and saw it there. I recommend anyone in a city where it is playing (I don't know if it's playing anywhere other than in London now) to see it.