Terry Pratchett® takes Shakespeare's Macbeth and then turns it up 'till the knob comes off. It's all there - a wicked duke and duchess, the ghost of the murdered king, dim soldiers, strolling players, a land in peril. And who stands between the Discworld® Kingdom of Lancre and destruction? Three witches. Esmerelda 'Granny' Weatherwax (intolerant, self-opinionated, powerful), Gytha 'Nanny' Ogg (down-to-earth, vulgar) and Magrat Garlick (naïve, fond of occult jewellery and bunnies).