Wintersmith: (Discworld Novel 35) by Terry Pratchett
SAYING IT WITH FROZEN ROSES AND ICEBERGS . . .
Tiffany Aching leaps into a dance - and suddenly the spirit of winter is in love with her. He's showering her with snowflakes and offering her a crown of ice - which is creepy, but also just a little bit . . . cool.
Now she's dancing to his tune. She can't change the steps.
But unless Tiffany can work out how to deal with the Wintersmith, there will never be another springtime . . .
FROM MASTER STORYTELLER TERRY PRATCHETT