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.