Fierce warriors and skilled craftsmen, the Celts were famous throughout the ancient Mediterranean world, the archetypal barbarians from the north, feared by both Greeks and Romans. And though this ancient thousand-year-old civilization was crushed by the military campaigns of Julius Caesar, the Celts remain an object of fascination to this day. Now, in The Ancient Celts, Barry Cunliffe, one of the world's leading authorities on European prehistory,...