“Arthur Miller: Collected Plays 1964-1982,” edited by contemporary, award-winning playwright Tony Kushner, is the second volume of the planned three-volume Collected Arthur Miller from the Library of America. This is one of those instances in which the book as an object asserts its own importance, since the look, feel, and heft—this volume alone runs to 848 pages—of the high-quality Library of America series is itself testimony to the cultural prominence of the authors included in its series.