The emperor and the saint. Frederick II of Hohenstaufen, Francis of Assisi, and journeys to medieval places. By Richard F. Cassady (foreword John Julius Norwich). Pp. xvii+454 incl. frontispiece and 59 ills. DeKalb, Il: Northern Illinois University Press, 2011. 35. 978 0 87580 439 2 - Robson, Michael (The journal of ecclesiastical history, 2012)