Great overall render, but it's little bit odd too. On the one side you got these really beautiful chairs and the lamp, but on the other side these obvios texturing problems on floor and the books. It's also very eyecatching in my opinion that the mirrored bookshelf is an instance of the other one. Also a little bit colour on the book textures would be nice. Who got only brown and white books, eh?

Another thing is, that the mirrors look a bit flat and are hanging too low, compared to the rooms height I think.
Those are just the things I have in mind looking over your picture, but as I said, great overall render, just a little bit sad to see, that you easily could have done better than that
