In this week's books podcast, Sam's guest is that man of parts Loyd Grossman. Loyd's new book is An Elephant in Rome: Bernini, the Pope, and the Making of the Eternal City, which explores the titanic influence of Bernini on the Rome we see today, and his partnership with Pope Alexander VII. Loyd tells Sam why you couldn't bring Italian Baroque home to meet your parents, about Bernini's far from congenial character - and why you'd stick an obelisk on top of an elephant anyway.