Since 1994, forensic ecologist, botanist, and palynologist Patricia Wiltshire has been using her expertise to aid police forces in England and beyond in proving - through microscopic environmental evidence - that a suspect was present where a crime occurred. That a getaway car did indeed cross a fallow field. That a dead body was buried in early summer, not late fall. On this week's episode, she discusses her stunning new memoir The Nature of Life and Death: Every Body Leaves a Trace. Then our editors join with their reading recommendations for the week, including books by Sonia Sotomayor (ill. Rafael López) and Marc Favreau.