Excellent study on the reign of Louis the German, a grandson of Karl der Grosse. Louis had a particularly long reign and used the time to fortify an eastern Frankish kingdom. This effort involved conflicts with his brother Charles in the west, relatives in Italy, and with Byzantium over church rights in the east. This is an important book for those interested in not the Carolingian period, but also the later centuries, since political moves made in this period helped set up future kingdoms in France, Burgundy, Italy, and Germany.