Book 2 in the Winternight Trilogy.
This one continues with the story of Vasya to whom we are introduced in the first book. Like the first book it's a Russian fairy tale, so set in Russia with much description of snow and dangerously cold temperatures, demons, fairy folk (domovoi), ghosts etc. We get to know a lot more about the winter King, introduced in the first book by Vasya's nurse and we hear more about Russian tradition and much about horses.
It's just as entertaining a read as the first one and I'm looking forward to the third one.