Zac Brettler Chrysa DaCosta/Picador New Yorker staff writer Patrick Radden Keefe has become one of a small number of narrative non-fiction writers whose latest book is keenly anticipated. He has become such a byword for a certain kind of investigative reporting, he even cameoed as himself in the final scene of HBO hit series, Industry, this year. His fifth book, London Falling, has been eagerly awaited, largely thanks to the impact of his last two books, which minted his sterling reputation. Hi