You might know him from his best-selling book “Say Nothing,” about the Troubles in Northern Ireland. Patrick Radden Keefe, a staff writer at The New Yorker, writes nonfiction page-turners about crime and family secrets. Keefe’s new book “London Falling” employs his signature story-telling magic to unravel the story of a 19-year-old kid who fell to his death from a luxury apartment building in London. This week on Say More, Keefe talks to Anna Kusmer about how this story tells a wider tale about how the mega-wealthy operate in the world’s richest cities. They also discuss Keefe’s Boston upbringing and his literary influences. Email us at [email protected].