When Arthur Gelb joinedThe New York Timesin 1944, manual typewriters, green eyeshades, spittoons, floors littered with cigarette butts, and two bookies were what he found in the city room. Gelb was twenty, his position the lowliest-night copy boy. When he retired forty-five years later, he was managing editor. On his way to the top, he exposed crooked cops and politicians; mentored a generation of our most talented journalists; was the first to praise...