In this real-life historical treasure hunt, bestselling author Graham Robb-"one of the more unusual and appealing historians currently striding the planet (New York Times)"-reveals the mapping of ancient Gaul as a reflection of the heavens, demonstrates the lasting influence of Druid science and recharts the exploration of the world and the spread of Christianity. This "fascinating" (Los Angeles Times) history offers nothing less than an entirely new understanding of the birth of modern Europe.