I wanted to bump up this post because there are a number of good books mentioned, however....
....I am looking for something for my 15-year old daughter to read for about a month starting around November 25th. She will be finished with her current literature book, but she's not really interested in A Christmas Carol. We are looking for something that has a holiday setting. She could, if need be, carry the reading over into early January.
I am also looking for a similar item for my 13-year old daughter. She is just finishing Little Women, and the language in that was a bit challenging for her. (It has made for a good vocabulary study, though!)