"A 'Discworld' classic... All is not well in the ANKH-MORPORK Opera House... A ghost stalks in the dark corridors, leaving strange letters for the management and... killing people. Granny Weatherwax and Nanny Ogg, two Lancre witches investigate, and are soon involved in all kinds of skulduggery, mayhem and ear-splittingly LOUD SINGING. Actually REALLY BAD SINGING..."