Patrick Radden Keefe digs into the mysterious death of a man posing as a Russian oligarch's son

Staff writer at The New Yorker, Patrick Radden Keefe tells the story of Zac Brettler, who inexplicably changed from a charming and hilarious boy into a money- and status-obsessed young man, who mixed with gangsters and shady businessmen.Patrick's new book begins with the description of a scene that…