Who were the Magi and why did they travel hundreds of miles to worship a newborn child? These are mysteries that have endured and remained unsolved for centuries, in part because nativity accounts and descriptions of the Magi vary dramatically - from the Bible itself to the Arabic Nativity Gospel. Intrigued by Marco Polo's claim to have visited the tomb of the Magi in a 'castle of fire-worshippers', Paul William Roberts here travels to Iran and traces the Magi's legendary journey overland to Bethlehem, through Iran, Iraq, Syria and Jordan. In the course of his extraordinary adventure, Roberts encounters a diverse cast of characters, from fearless smugglers to serene Zoroastrian priests, and chases clues from Marco Polo's Travels and the Dead Sea Scrolls to the legends of King Solomon and the Crusader Knights.