The New York Times bestselling author of The Silver Linings Playbook offers a timely novel featuring his most fascinating character yet, a Vietnam vet embarking on a quixotic crusade to track down his nemesis from the war.After sixty-eight-year-old David Granger crashes his BMW, medical tests reveal a brain tumor that he readily attributes to his wartime Agent Orange exposure. He wakes up from surgery repeating a name no one in his civilian life has ever heard—that of a Nativ