Biographies of sixty people from the Trastámara dynasty of Castile, Aragon and Na-varre are presented in this book. The fifteenth century is the prelude to the most important century for Spain, the sixteenth. There was still a significant area under Muslim control: the taifa kingdom of Granada. As it was a protectorate of Castile, however, it was not a serious problem as it had been in the Early Middle Ages of the Reconquest. In this regard, an atmosphere of peace reigned over the Christian and Muslim kingdoms.