Recently I finished Centurion’s Daughter, by Justin Swanton. Usually I don’t care for historical novels, but I liked this one. It even has some maps and illustrations.
The action takes place mostly in Gaul beginning in 486 A.D. At the beginning of the story, the daughter of the title is trying to find and reunite with her father, a Roman centurion, who longs for the return of the old empire and despises the barbarians.
The daughter is a Christian, which is to say, at that time, a Catholic. The father is not. When the Franks battle to take over his town, he tries to rally the citizenry to the cause of the Roman Empire, thinking that if his town can prevail, the tide can be turned back and the empire restored.
The book seems to be well researched, with interesting characters, and it presents a story on a human level of a civilization in transition—a path upon which our own civilization may be embarked.