If you are still looking for something to read for your spiritual reading during Advent, look no further.
This is another excellent collection of our Holy Father's sermons, delivered during Advent and Christmastide last year.
I have yet to read them all but thought I would bring them to your attention now, as waiting till I've finished would mean it was too late for your Advent reading.
I have read those relating to the four Sundays in Advent, and they are very good: as you would expect. So I presume to recommend this only half-read: if the second half is no good, send me your copies with detailed notes on why, and I'll give you a refund (if I agree)!
I may even write a proper review once I've finished it.