Killing the Emperors (Robert Amiss/Baroness Jack Troutbeck Mysteries, 12)

Why have luminaries of the world of conceptual art been kidnapped? And why has Baroness (Jack) Troutbeck - who has publicly described them all as knaves or fools - gone missing too? As victims surface publicly and horrifically dead, in what become 'The Hommage Murders', can she be rescued in time?