These weird sisters are no black and midnight hags...there are no fires that burn nor any cauldrons that bubble....Terry Pratchett spins Macbeth on it’s literary head and Wyrd Sisters lampoons the murderer-king trying to sandpaper the guilt off his hands so comically that Shakespeare must be turning in his grave......the imagery that makes Macbeth the most vivid of all the Bard’s plays appears in Pratchett as well - imparting the only dark, sombre note in a story that is subversive in all other aspects...the ghost of the dead king is buffoonish, the real prince is a roving actor (gasp!) and the court jester succeeds to the throne...but the evil is real and cold - made even more so by Pratchett’s comic treatment of it...the book ridicules the idea of royalty and ruling and in doing so underlines the fact that birth and rank cannot determine the destiny of a man as much as ability...and whyever not when the three witches - Granny Weatherwax, Nanny Ogg and Magrat Garlick are on hand to deal with mad usurpers and evil queens? ... a Fool could change the world with instruments of darkness such as these