Many historians had been trying for some time to set the record straight on the Crusades—misconceptions are all too common. For them, current interest is an opportunity to explain the Crusades while people are actually listening. With the possible exception of Umberto Eco, medieval scholars are not used to getting much media attention. We tend to be a quiet lot (except during the annual bacchanalia we call the International Congress on Medieval Studies in Kalamazoo, Michigan, of all places), poring over musty chronicles and writing dull yet meticulous studies that few will read. Imagine, then, my surprise when within days...