Old books' scent

I love the smell of old (really old, but not dusty) books. It reminds me of some kind of vanilla scent, that is only to be found in them. I smelled it a few weeks ago, when I bought Conrad's Heart of Darkness, second hand 1972 Penguin Modern Classics edition (3€) in a second hand bookstore in Göttingen (Germany).

Written by Ruben Berenguel