When Muslim invaders conquered Sicily in the ninth century, they took control of a weakened Greek state in cultural decadence. When, two centuries later, the Normans seized control of the island, they found a Muslim state just entering its cultural prime. Rather than replace the practices and idioms of the vanquished people with their own, the Normans in Sicily adopted and adapted the Greco-Arabic culture that had developed on the island. Yet less than a hundred years later, the cultural and linguistic mix had been reduced, a Romance tradition had come to dominate, and Sicilian poets...