Will Hunt is fascinated with the world below us: "Every manhole, every doorway, every stairway going down into the dark [feels] like a potential portal into this like separate world." His book about exploring sewers, subway tunnels, and other hidden places around the world is 'Underground.'

Also, we remember pianist and composer Michel Legrand who died Saturday. He won Oscar Awards for his compositions in 'Yentl,' 'Summer of '42' and 'The Thomas Crown Affair.' Legrand spoke with Terry Gross in 1996.

Book critic Maureen Corrigan reviews the coming-of-age novel 'The Falconer,' by Dana Czapnik.