Peace reigns in the Kingdom of Leon-Castile, and Antonio Perez returns to his native Asturias to discover the fate of his remaining family. Whilst there, he reconnects with Jimena, his childhood companion and the girl he once loved. But when his loyal friend Rodrigo and Jimena fall in love, Antonio is consumed by jealousy. As the wedding of two of his closest companions approaches, Antonio must battle his enemies and his inner demons, lest it lead to the ruin of all he holds dear.Having secured his borders, Alfonso VI of Leon-Castile pushes south against the Moors. When a raid by the Moors threatens Castile, Rodrigo leads his men on a daring campaign of vengeance. But with the venture a credible threat to the uneasy peace Alfonso has brokered with the taifa kings, Rodrigo's bravado could have dire consequences to himself and the security of the kingdom. With enemies old and new circling, will Rodrigo Diaz de Vivar find greatness on the battlefields of Hispania, and cement his reputation as one of the most feared warriors in the land, or will his actions lead to his ruin?Master of Battle is the exhilarating fourth instalment of the Legend of the Cid.