Before he was a writer, Miguel de Cervantes was a soldier. Enlisting in the Spanish infantry in 1570, he fought at the battle of Lepanto, was seized at sea and held captive by Algerian corsairs, and returned to Spain with a deep knowledge of military life. He understood the costs of heroism, the fragility of fame, and the power of the military culture of brotherhood. In Heroic Forms, Stephen Rupp connects Cervantes's complex and inventive...