. . . . . . "Maskerade is the eighteenth novel in the Discworld series by Terry Pratchett. The witches Granny Weatherwax and Nanny Ogg visit the Ankh-Morpork Opera House to find Agnes Nitt, a girl from Lancre, and get caught up in a story similar to The Phantom of the Opera."@en . . "Maskerade"@en . . . "0-575-05808-0" . .