Long before American politics and entertainment merged in the form of the Trump White House, Mark Leibovich chronicled the uneasy relationship between elected officials, media figures and lobbyists in This Town. Now, he is back with a new book about America’s other leading religion: football. Leibovich, a Patriots fan, had uncommon access to the league’s owners, commissioner and players over the past few seasons, as the NFL confronted concussions, social protest, and team relocation. His new book is Big Game: The NFL In Dangerous times.