Gerald M. Berkowitz 
American Drama of the Twentieth Century [PDF ebook] 

In this book Professor Berkowitz studies the diversity of American drama from the stylistic, experimental plays of O»Neill, through verse, tragedy and community theatre, to the theatre of the 1990s. The discussions range through dramatists, plays, genres and themes, with full supporting appendix material. It also examines major dramatists such as Eugene O»Neill, Arthur Miller, Sam Shephard, Tennessee Williams and August Wilson and covers not only the Broadway scene but also off Broadway movements and fringe theatres and such subjects as women»s and African-American drama.