The Apple of His Eye

The thirteenth century brought new urgency to Catholic efforts to convert non-Christians, and no Catholic ruler was more dedicated to this undertaking than King Louis IX of France. His military expeditions against Islam are well documented, but there was also a peaceful side to his encounter with the Muslim world, one that has received little attention until now. This splendid book shines new light on the king’s program to induce Muslims—the “apple of his eye”—to voluntarily convert to Christian