There are a few foundational books I want to recommend first regarding the history of performance/literary theater: Not enough about classic work Towards a Poor Theatre (Theatre Arts (Routledge Paperback))primarily Grotowski, linked here, and newer more obscure work also linked in this review. Polish American poet Hedwig Gorski whose book linked here documents Intoxication: Heathcliff on Powell Street how they put Grotowski's Poor Theater into practice in the 1970s in a skewed way, maybe a sloppy American way compared to the long traditions of Polish theatre. The results were fascinating, to say the least. For those less interested in theory, you might be interested in knowing what the actors in the film My Dinner with Andre linked here My Dinner with Andre were discussing: Grotowski theatre exercises, theory, and practice. Years ago, I had the privilege of seeing a Grotowski trained actor from South America do a solo performance, and my life was changed forever. I highly recommend Grotowski essential book as a foundation theory for all the individual theater movements, including slam/hip hop of today, and the Gorski memoir and DVD I linked here as essential for anyone interested in the real history of American poetry in performance, solo theater, and the spoken word movement including slam.