I just finished "One Week in December" by Holly Chamberlain.
If you want to read a novel about a really dysfunctional family full of secrets and angst at Christmas time this is the book for you.
I was a bit painful in parts. It actually invoked tears a couple of times. It was a tad depressing in parts.
But, it ends well.
I recommend the book as long as you know going into it that there are painful parts. It is good, though. Really.