Book excerpt: "Routledge Performance Practitioners" is a series of introductory guides to the key theatre-makers of the 20th century. Each volume explains the background to and the work of one of the major influences on 20th and 21st century performance. These compact, well-illustrated and clearly written books unravel the contribution of modern theatre's most charismatic innovators, through: personal biography; explanation of key writings; description of significant productions; and reproduction of practical exercises.