MaskeradeMaskerade 'Cracking dialogue, compelling illogic and unchained whimsy . . .' Sunday Times The Discworld is very much like our own if our own were to consist of a flat planet balanced on the back of four elephants which stand on the back of a giant turtle, that is . . . What sort of person sits down and writes a maniacal laugh? And all those exclamation marks, you notice? Five? A sure sign of someone who wears his underpants on his head. Opera can do