I counted this among my October reading, though technically I didn't finish it until today. It's a YA, fantasy story, set in a strange underground land where people are born with expressionless faces and have to learn how to show their emotions. The main character is from Above, from the world where your face shows what you are feeling and thinking all the time and is found as a small child by a master cheesemaker. For various reasons, he raises her and hides her away from the underground people. When, some years later, she breaks out into the underground world, all kinds of havoc gets wreaked. It's quite an interesting construct, which I enjoyed. Hardinge is a good writer, with some really unusual ideas.