'Read! Your Lord is the Most Bountiful one who taught by the pen, who taught man what he did not know.' The Qur'an, believed by Muslims to be the word of God, was revealed to the Prophet Muhammad 1400 years ago. It is the supreme authority in Islam and the living source of all Islamic teaching; it is a sacred text and a book of guidance, that sets out the creed, rituals, ethics, and laws of the Islamic religion. It has been one of the most influential books in the history of