Edward Braun 
Director & The Stage [PDF ebook] 
From Naturalism to Grotowski

Beginning with the triple impulses of Naturalism, symbolism and the grotesque, the bulk of the book concentrates on the most famous directors of this century — Stanislavski, Reinhardt, Graig, Meyerhold, Piscator, Brecht, Artuaud and Grotowski. Braun’s guide is more practical than theoretical, delineating how each director changed the tradition that came before him.