1) Discworld book 
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. ==Plot summary== The story begins with Agnes Nitt leaving Lancre to seek a career at t...