Book excerpt: Deep in the heart of seventh-century Arabia, a new prophet named Muhammad has arisen. As his message of enlightenment sweeps through Arabia and unifies the warring tribes, his young wife Aisha recounts Muhammad's astonishing transformation from prophet to warrior to statesman. But just after the moment of her husband's greatest triumph -- the conquest of the holy city of Mecca -- Muhammad falls ill and dies in Aisha's arms. A young widow, Aisha finds herself at the center of the new Muslim empire and becomes by turns a teacher, political leader, and warrior. Written in beautiful prose and meticulously researched, Mother of the Believer is the story of an extraordinary woman who was destined to help usher Islam into the world.