Christmas books

There is a plethora of Christmas books out there much like the Christmas movies.  However, I find that most of us are drawn to a few that often become traditional to reread during this time of year.  One of my favorite is a book by Barbara Robinson titled "The Best Christmas Pageant Ever."   While it's not considered a Christmas classic by most, it has become a Christmas tradition for me.  I'm wondering if there are any other lesser known Christmas books that have become household favorites.  Feel free to share them.