The appearance of a facsimile volume (costing around six thousand dollars) of the celebrated, partially destroyed “Turin-Milan Hours” (Turin, Museo Civico d’Arte Antico, inv. no. 47) is reason enough to rejoice for scholars, who would otherwise probably never have close contact with these celebrated miniatures, some of which (controversially) have been attributed to Jan van Eyck. Now there is still more reason for celebration: the accompanying commentary volume has appeared in three languages (nothing like...