For the Muslim faithful, the familiar sound of the Qurʾanic recitation is the predominant and most immediate means of contact with the Word of God. Heard day and night, on the street, in taxis, in shops, in mosques, and in homes, the sound of recitation is far more than the pervasive background music of daily life in the Arab world. It is the core of religious devotion, the sanctioning spirit of much cultural and social life, and a valued art form in its own right. Participation in recitation, as reciter or listener, is itself an act of worship, for the sound is basic to a Muslim's...