It features Granny Weatherwax (introduced in Equal Rites), and her two associate witches, Nanny Ogg and Magrat Garlick (introduced in Wyrd Sisters). They visit Genua, on the other side of the continent, where they confront Granny's sister, Lily Weatherwax, who is manipulating people using the power of stories.  The plot contains references to many fairy tales and fantasy novels, including Little Red Riding Hood, Sleeping Beauty, Cinderella, and The Frog Prince. There are also brief references to Gollum, and The Wonderful Wizard of Oz.  Another main theme is that of Voodoo. One of the characters is a voodoo witch named Erzulie Gogol (Erzulie is the name of a voodoo goddess), and a zombie named Baron Saturday (which is an obvious reference to Baron Samedi).

A very funny book, it's about travel and fairytales and the swamp, it's Disneyland meets Live and Let Die set in New Orleans and it's about witches and voodoo. I think Magrat really comes into her own in this story, while Granny still gets the main plot line she's not as suffocating as in Wyrd Sisters and Nanny has some of the best lines ever written. The cameos by Death are very welcome and the finale with the maze of mirrors seems a just and suitable form of judgement.