The Opera House, Ankh Morpork . . . a huge, rambling building, where masked figures and hooded shadows do wicked deeds in the wings . . . where dying the death on stage is a little bit more than just a metaphor . . . where innocent young sopranos are lured to their destiny by an evil mastermind in a hideously deformed evening dress . . . Where . . . there's a couple of old ladies in pointy hats eating peanuts in the stalls and looking at the big chandelier and saying things like: 'There's an accident waiting to happen if ever I saw one'. Yes . . . Granny Weatherwax and Nanny Ogg, the Discworld's greatest witches, are back for an innocent night at the opera. So there's going to be trouble (but nevertheless a good evening's entertainment with murders you can really hum)