Wintersmith by Terry Pratchett

Tiffany Aching is continuing her training as a witch under the fearsome Miss Treason, though Granny Weatherwax is still keeping watch from afar. Tiffany makes an unfortunate choice during a winter festival and attracts the attention of the Wintersmith, a mythological figure who, this being Discworld, is rather less mythological and more real than Tiffany prefers. Once again, she joins forces with the Nac Mac Feegle to try to overcome this threat...before she is sucked into the mythological story against her will.Wintersmith is the thirty-fifth Discworld novel (out of forty-one; the ending is just starting to edge into sight) and the third to focus on the character of Tiffany Aching. Nominally, this is a YA-focused Discworld novel. However, given Sir Terry Pratchett's resolute refusal to talk down to younger readers, there isn't a vast amount of difference between this and an "adult" Discworld novel, save toning down Nanny Ogg's double entendres a tiny bit.Wintersmith's theme, as much…