This one is firmly in my list of favorites. I'm fortunate to be fluent in french, but I don't get the opportunity to use it much any more, so I occasionally read books in french - this one twice. Forget romance, French is the language of revenge! Well, those two do seem closely related now that I think about it.
Also by Dumas, I've also read The Three Musketeers, Twenty Years After and The Man in The Iron Mask. They're all great adventure stories that most people have mistaken impressions of due to poor movie treatments.
A friend noticed when I was re-reading one of these and said: "You're reading a book by someone named Dumb-Ass?"