I bought a second-hand kindle and downloaded the count of Monte Cristo from project Gutenberg. The best thing about the kindle is you can have a French dictionary on it, so everytime you don't know a word you just hold your finger on it and the dictionary opens. It's not a french-english dictionary so you have to read the definitions in French, but for the price of a ten dollar kindle it is pretty awesome.
Some say Dumas is old French, but he's an awesome author and his books are free to download.