Novelist Tim O’Brien is best known for his novels and stories about the Vietnam War. He did a tour of duty in Vietnam as a foot soldier, in 1969. He won a 1979 National Book Award for his novel “Going After Cacciato.” His 1990 novel, “The Things They Carried,” was recently named one of the 65 most influential books in U.S. history by the Library of Congress. O’Brien is the subject of the new documentary “The War and Peace of Tim O’Brien.” It focuses on his life after becoming a father in 2003, at the age of 58. He put his writing on hold to devote himself to being a parent, along with his wife.