For the past four hundred years, the groundbreaking Italian artist, Caravaggio, has challenged, intrigued, and transformed us. Suzanne Lang talks with Terence Ward on his book that combines memoir, history, biography, and journalism, The Guardian of Mercy: How an Extraordinary Painting by Caravaggio Changed an Ordinary Life. Suzanne also talks with author Eugenio Volpe on his post-modern novel I, Caravaggio, that depicts the artist’s phychological unraveling while evolving his art and arising as a super star.