If you're looking for some classic children's books to either gift to someone or to add to your Christmas collection I highly recommend these two books:
The Night Before Christmas (Unfortunately out of stock but keep an eye out if you're interested)
The Twelve Days of Christmas
Both of these books are classic and have beautiful illustrations! I bought them for my daughter this year and she's in love with the Twelve Days of Christmas because we don't just read it, we sing it.