Maribel Fierro is a Research Professor at the Center of Human and Social Sciences (CCHS) of the Consejo Superior de Investigaciones Científicas, Madrid. Her previous publications include Al-Andalus: saberes e intercambios culturales (2001), Abd al-Rahman III, The First Cordoban Caliph (2005), Los almohades: problemas y perspectivas (as co-editor, 2005) and El cuerpo derrotado: cómo trataban musulmanes y cristianos a los enemigos vencidos (Península Ibérica, ss. VIII-XIII) (as co-editor, 2008).