The Dark Ages - Isaac Asimov

Germans Versus Rome--The Goghic Kingdoms--The Darkness Comes--The Merovingians--The Mayors of the Palace--From Mayor to King--Charlemagne--The Successors of Charlemagne--The End of the Carolingians--The Darkness Begins

**Former library copy**

Goodreads: 4.12

Hardcover, 1968