Mia McKnight It depends on how mature you are and how high your reading level is. If you can understand it (it's not that difficult to read but there's advanced vocabulary) I would recommend 13 at the very youngest. Also, there really isn't anything too inappropriate or vulgar, some things are just implied and not described with much detail. The violence isn't very graphic and curses are used sparingly. I read this book at 15 and loved it, some of the words used I didn't recognize and I had to look up, but for the most part it was an engaging read. I realize that this book is long and that Hugo goes into very descriptive detail about the atmosphere and history of an area (at times it doesn't relate much to the story line), but you have to read through them to get the full effect of the novel and to understand Hugo's views. He also places events out of order (most likely for dramatic effect) which can be confusing. At times I would have to re-read some passages to understand where it was coming from and what it relates to. Overall, I think that if you can understand it and are willing to put in the time and effort (it doesn't take much effort anymore once you fall in love with it) you can probably read it at 13.