A brave, frightened women is risking her life in a daring rescue mission. In these post-war years, medieval scholar Margarete Kühn is not dealing with spies and Nazis: instead, she has kidnapped a book. Assisted by her friend Caroline Walsh, an American military spouse, Margarete has secured the manuscript’s safe passage across 400 miles, traversing the wildest and most hostile parts of Germany’s war-ravaged landscape to a secluded monastery high above the banks of the Rhine. As well as saving the precious reams of vellum, the women are preserving something more important still: the legacy of a 12th-century saint whose...