Patrick Radden Keefe, author of "London Falling," has been hailed as Hollywood's new favorite author. The idea came while on the set of the FX adaptation of his best-selling book, "Say Nothing," about the Troubles in Northern Ireland. His new book follows the story of a family he knew, Zach Brettler, whose son had committed suicide and had been consorting with notorious members of London's underworld. Keefe was introduced as an investigative journalist and has served as an executive producer on the Netflix miniseries "Painkiller." His work has also influenced the Sackler family's $7.4 billion settlement over the opioid crisis.