14. Brook’s most well-known statement of his technique came in The Empty Space (London: Penguin, 1968) and was carried forward in There Are No Secrets (London: Methuen Drama, 1993). For a contemporary presentation of Swedish group theatre, see Stefan Johansson and Gösta Kjellin, “Théâtre de groupe en Suède/Group Theatre in Sweden,” published as a separate number of Swedish Theatre Suedois, no. 11 (June, 1970).