The complete series of Ngaio Marsh reissues concludes with the re-publication of this 20th anniversary edition of this, her final novel. Peregrine Jay, owner of the Dolphin Theatre, is putting on a magnificent production of Macbeth, the play that, superstition says, always brings bad luck. But one night the claymore swings and the dummy's head is more than real: murder behind the scene. Luckily, Chief Superintendent Roderick Alleyn is in the audience…