God’s Hammer: A History of the Viking CrusadesFrom the bestselling author of Viking Britain, a stunning new perspective on the medieval world. When we think of the Crusades, the image is usually squarely medieval: an era of pageantry, knights, castles and cathedrals. An age of violence, certainly, but one glossed with faith, chivalry and Christian derring do. When we think of the Vikings, we most often see barbarism and pagan menace: Norse warriors drenched in blood sacrifice and presided over by