Wintersmith (Discworld 35)

Enter master story-teller Terry Pratchetts incredible Discworld in this third book in the Tiffany Aching series… Tiffany Aching is starting to realize that some witches are a bit odd… When the Spirit of Winter takes a fancy to young witch Tiffany Aching, he decides he wants her to stay in his gleaming, frozen world. Forever. But forever is a long time, so right now Tiffany is just trying to make it through the Winter and hopefully find a way to escape. It will take all of Tiffanys skill and cunning, as well as some help from the legendary Granny Weatherwax and the irrepressible Wee Free Men to survive until Spring. And survive she must, because according to the other witches, if Tiffany doesn’t make it to Spring… Spring won’t come at all.