Between October 1961 and October 1962, the Yankees and the Mets shared the city for the first time, their front offices located on opposite sides of Fifth Avenue in midtown Manhattan, and their playing fields—Yankee Stadium and the Polo Grounds—situated on opposite sides of the Macombs Dam Bridge. This book tells the story of the first year of their life together as New York City rivals. The emerging rivalry between the New York Yankees and the New York Mets was about more than just games won or money earned. As personified by Mets manager Casey Stengel and Yankees right-fielder Roger Maris, it was also a struggle over the future of the game.