The Carolingian era refers to works set under the Frankish dynasty that reigned in France a.d. 751–987, firstly under Charlemagne, and in Germany until a.d. 911.

The Carolingian World (Cambridge Medieval Textbooks)
The Carolingian Empire
Carolingian Culture: Emulation and Innovation
Carolingian Civilization: A Reader
Charlemagne: The Formation of a European Identity
Charlemagne's Courtier: The Complete Einhard (Readings in Medieval Civilizations & Cultures #3)
Charlemagne: Empire and society
The Frankish Kingdoms Under the Carolingians 751-987
Arte altomedievale Early Medieval Art
Roman Barbarians: The Royal Court and Culture in the Early Medieval West (Medieval Culture and Society)
Be a Perfect Man: Christian Masculinity and the Carolingian Aristocracy (The Middle Ages Series)
The Formation of Christian Europe: The Carolingians, Baptism, and the Imperium Christianum
Power and Religion in Merovingian Gaul: Columbanian Monasticism and the Frankish Elites (Cambridge Studies in Medieval Life and Thought: Fourth Series, Series Number 98)
The Conquest of Saxony AD 782–785: Charlemagne's defeat of Widukind of Westphalia (Campaign)
Religious Women in Early Carolingian Francia: A Study of Manuscript Transmission and Monastic Culture (Fordham Series in Medieval Studies)