I am a very big Jan Karon fan and have read all her books and this one is my favourite. The nativity project Father Tim is working on is a brilliant theme in this book and all your favourite Mitford characters are there as well.
I just found that even more than in the other novels this book had a special warmth and joyfulness to it, perhaps because it culminated in the celebration of our Lord and Saviour's birth :) I highly recommend it, its a book you will want to read each year during Advent guaranteed!