As President Bush is preparing to invade Iraq, Wall Street Journal correspondent Asra Nomani embarks on a dangerous journey from Middle America to the Middle East to join more than two million fellow Muslims on the hajj, the pilgrimage to Mecca required of all Muslims once in their lifetime. Mecca is Islam's most sacred city and strictly off limits to non-Muslims. On a journey perilous enough for any American reporter, Nomani is determined to take along her infant son, Shibli -- living proof that she, an unmarried Muslim woman, is guilty of zina, or "illegal sex." If she is found out, the puritanical Islamic law of the Wahabbis in Saudi Arabia may mete out terrifying punishment. But Nomani discovers she is not alone. She is following in the four-thousand-year-old footsteps of another single mother, Hajar (known in the West as Hagar), the original pilgrim to Mecca and mother of the Islamic nation.