Book Recs: 10 Christmas-Themed Sci-Fi/Fantasy Books

It's December! And that means Christmas all the time everywhere all over everything. So... what better thing to post about than Christmas-themed sci-fi/fantasy books?! I haven't actually read all of these, and some of these I have read but didn't love, but everyone has different taste! So these aren't so much personal recommendations as just me bringing some Christmas books to your attention...