"One of the ""Discworld"" novels. The witches Granny Weatherwax,
Nanny Ogg and Magrat Garlick travel to the distant city of Genua to
make sure that a servant girl doesn't marry a prince. But all
they've got is Mrs Gogol's voodoo, a one-eyed cat and a secondhand
magic wand that can only do pumpkins. "