Witches Abroad by Terry Pratchett

In this book Granny Weatherwax, Nanny Ogg, and Magrat travel to Genua, where Magrat has been sent by the witch who left Magrat her wand and her position as fairy godmother. With moments that spoof The Lord of the Rings, The Wizard of Oz, and countless fairy tales (but most of all Cinderella), this story is hilarious. There's also a lot of travel humor. I can't get over how smart these books are in their parody. All of which is to say, this book is another one smashed out of the park for Pratchett.