William Zinsser

William Knowlton Zinsser was an American writer, editor and teacher. He began his career working as a feature writer for the New York Herald Tribune. He then became a free-lance contributor to magazines, and authored numerous books; his best known was On Writing Well, a style guide for non-fiction writers that sold an estimated 1.5 million copies. Over the years he taught writing at several universities including Yale, The New School, and Columbia.