In A Saving Science, Eric Ramirez-Weaver explores the significance of early medieval astronomy in the Frankish empire, using as his lens an astronomical masterpiece, the deluxe manuscript of the Handbook of 809, painted in roughly 830 for Bishop Drogo of Metz, one of Charlemagne's sons. Created in an age in which careful study of the heavens served a liturgical purpose--to reckon Christian feast days and seasons accurately and thus reflect a "heavenly" order--the diagrams of celestial bodies in the Handbook of 809 are extraordinary signifiers of the intersection...