National Book Award winner Nathaniel Philbrick visited the Penguin Bookshop in Sewickley, Pa., to kick off the tour for the paperback of his most recent book, Valiant Ambition: George Washington, Benedict Arnold, and the Fate of the American Revolution (Penguin). Pictured: (l.-r.) manager Mary Ferris, Philbrick, Kristin Pidgeon and owner Susan Hans O'Connor.