Julián Casanova is professor of Modern History at the University of Zarazoza.His books include "Anarquismo y revolución en la sociedad rural aragonesa, 1936-1938" (Anarchism and Revolution in Rural Aragonese Society, 1936-1938, 1985; Crítica 2006), "La historia social y los historiadores"  (Social History and Historians, Crítica, 1991; paperback 2003), "La Iglesia de Franco" (Franco's Church, Crítica, 2005), "Anarquismo y violencia política en la España del siglo XX" (Anarchism and Political Violence in 2007), "República y guerra civil" (Crítica, 2007) and, with Carlos Gil Andrés, "Historia de España en el siglo XX" (Ariel, 2009). He has been visiting professor at presitigous British, US and Latin American universities . "De la calle al frente was published in English by Routledge (London, 2005)  with the title "Anarchism, the Republic and Civil War in Spain: 1931-1939".