Howl's Moving Castle — Diana Wynne Jones

IN WHICH A WITCH BEWITCHED THE HATTER'S DAUGHTER ... AND THEN SOME.

Sophie lived in the town of Market Chipping, which was in Ingary, which was a land where invisible cloaks and seven-league boots really did exist. Which meant that nothing was quite as it seemed and anything could happen--especially when the Witch of the Waste got her dander up. Which was often.

As her younger sisters set out to seek their fortunes, Sophie stayed in her father's hat shop. Which proved most unadventurous, until the Witch of the Waste came to buy a bonnet, but was not pleased. Which was why she turned Sophie into an old lady. Which was spiteful witchery.

Now Sophie must seek her own fortune. Which means striking a bargain with the lecherous Wizard Howl. Which means entering his ever-moving castle, taming a blue fire demon, grappling with green slime ...and meeting the Witch of the Waste head-on. Which was more than Sophie bargained for.