We used to go to the library every week in December and gather all the Christmas books (picture books) our library box could hold. We read tons, so I can't really remember any titles. Some had great stories, some excellent photos, some were religious, some not. Sometimes we got the same story told by a different person! As the years went by, we tried to find favourite ones from previous years.
One that we bought, that is read everyday until Christmas day, is The House of Wooden Santas by Kevin Major.