Books about Christmas elves, and about Christmas gnomes

 I made at www.google.com a search "books about Christmas elves", and it brought in the first rows these books: 

I also searched for "books about Christmas gnomes" :

I guess a Christmas elf is often agile and young, while a Christmas gnome is often more unmoving and like the elderly. But in Finnish language there is just one word: "tonttu" or "joulutonttu".