Witches abroad : a Discworld novel

The twelfth Discworld novel -- It seemed an easy job . . . After all, how difficult could it be to make sure that a servant girl doesn't marry a prince? But for the witches Granny Weatherwax, Nanny Ogg and Magrat Garlick, travelling to the distant city of Genua, things are never that simple. Servant girls have to marry the prince. That's what life is all about. You can't fight a Happy Ending. At least -- up until now. "From the Trade Paperback edition."