This wide-ranging study of medieval Europe's response to the challenge of Islam examines the relationship between ideas of crusade and mission, between European projects for military conquest and those for the conversion of Muslims to Christianity. Covering the years from the emergence of Islam to the fourteenth century, Benjamin Z. Kedar discusses not only the crusades and the Crusading Kingdom of Jerusalem but also the confrontation of Catholics and Muslims in Sicily and Spain. Originally published in 1984. The uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.