10 books • 4 series
Book #1: Een gids voor Theatresports(TM) van Keith Johnstone
Book #1: 키이스 존스톤의 씨어터스포츠(tm) 가이드
Book #1: 凯斯-约翰斯通的即兴剧场运动会(TM)指南 - A Guide to Keith Johnstone's Theatresports(TM)
Book #3: A Guide to Keith Johnstone's Maestro Impro(TM)