Every year, trolls break down Kyri's door and devour her Christmas party. But this year, the trolls are in for a surprise: a boy and his pet ice bear on their way to Oslo have come in from the cold. And once the ice bear is done with the trolls, you can bet they won't come knocking next Christmas Eve! Once again, Jan Brett creates an original Christmas story full of warmth and magic. With beautiful borders, intricate illustrations, and a stunning display of the Northern Lights, Who's That Knoking on Christmas Eve? will rightly take its place among Jan's Christmas favorites with the whole family.