Wintersmith

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...