In this week's Book Club podcast, Sam Leith's guest is one of America's foremost magazine journalists, the New Yorker's Lawrence Wright. His new book is The Plague Year: America In The Time of Covid. He tells Sam what a book brings to recent history that week-to-week journalism can't, about the extraordinary happenstance that put him in contact with one of the unsung heroes of the vaccine race, and the three reasons Covid was such a catastrophe for the US.