There was an unprecedented demand for serious books or ???problem books??? (biblia problematismou) addressing critical social issues and bringing readers closer to modern European thought; the result was publication in translation of such authors as Herbert Marcuse, Antonio Gramsci, Jean-Paul Sartre, Arnold Hauser, Eugene Ionesco, and Bertolt Brecht (Kontogiannes 1970: 28-29; Kontogiannes 1971: 11