Synopsis This book deals with the decisive encounters between East and West, - Islam and Christendom. This is one of the most important subjects of Islamic history, indeed perhaps the most important of all. The encounter between Islam and Christendom in the fields of war or peace, was always decisive and had the most far-reaching effects on their destinies. This work originally published in Arabic is being issued in English for the benefit of Muslims all over the world, who know no Arabic but who could read English.