Here are some of my favorites and ones I can't wait to read:
Blue Christmas and Christmas Bliss by Mary Kay Andrews (sequels to her novels Savannah Blues and Savannah Breeze - LOVE this series!)
Winter Street, Winter Stroll, and Winter Storms by Elin Hilderbrand (my favorite author ever! All of her books take place on Nantucket and are GREAT beach reads. This series is perfect for Christmas!)
**Warning - there is another Elin Hilderbrand book called "Christmas on Nantucket". It is the SAME BOOK as Winter Stroll. For some reason they gave it a different name. Don't let it confuse you!
A Lowcountry Christmas by Mary Alice Monroe (A great South Carolina author!)