The King of Ys Series by Poul Anderson, Karen Anderson

In the waning days of the Roman Empire, Magnus Maximus sends his prefect Gratillonius to western Gaul and the faraway land of Ys, a place shrouded in legend and ruled by a cruel and tyrannical king. When the sovereign challenges Gratillonius to a duel, the envoy from Rome emerges victorious and claims the throne as the new king of Ys, inheriting a land whose religion, culture, and history are entirely foreign... moreIn the waning days of the Roman Empire, Magnus Maximus sends his prefect Gratillonius to western Gaul and the faraway land of Ys, a place shrouded in legend and ruled by a cruel and tyrannical king. When the sovereign challenges Gratillonius to a duel, the envoy from Rome emerges victorious and claims the throne as the new king of Ys, inheriting a land whose religion, culture, and history are entirely foreign. He also gains the former king’s nine wives, the Gallicenae, a powerful group of women to whom he must appear equally devoted despite his growing feelings for one in particular. As he adjusts to his new role as ruler of Ys, Gratillonius must fight to keep his strange new country on its feet while the rest of the Roman Empire begins to crumble around him. less

Ys: Magical city shrouded in legend, where Gratillonius, doomed by the gods to be the last King of Ys, refused to accept defeat, and became a legend that would ring down the corridors of time.

As the Roman Empire loses its grip on its far-flung territories, the mystical kingdom of Ys in western Gaul is in great danger of slipping into oblivion. Suffocated for years by the rule of a tyrant king, Ys’s last hope arrived in the form of a Roman emissary, Gratillonius, who defeated the sitting king to take the throne himself... moreAs the Roman Empire loses its grip on its far-flung territories, the mystical kingdom of Ys in western Gaul is in great danger of slipping into oblivion. Suffocated for years by the rule of a tyrant king, Ys’s last hope arrived in the form of a Roman emissary, Gratillonius, who defeated the sitting king to take the throne himself. Now Gratillonius must grapple with the kingdom’s political strife and religious tensions while balancing his responsibilities to the Gallicenae, nine wide-ranging witches who have become his wives. Though Rome seeks to spread Christianity, and Gratillonius stands firm in his worship of Mithras, the Ysans hold to an entirely different religion in service of pagan deities who must be obeyed lest grave consequences descend on the fragile kingdom. less

In book three of the King of Ys series, Gratillonius’s reign faces a deadly new threat from across the sea For sixteen years Gratillonius has been the king of Ys, a position he has used to bring the once-teetering city-state back to stability as the Roman Empire continues to collapse around it. Rome would prefer a more malleable leader in Gratillonius’s place and makes no secret of it... moreIn book three of the King of Ys series, Gratillonius’s reign faces a deadly new threat from across the sea For sixteen years Gratillonius has been the king of Ys, a position he has used to bring the once-teetering city-state back to stability as the Roman Empire continues to collapse around it. Rome would prefer a more malleable leader in Gratillonius’s place and makes no secret of it. As pressure from Roman leadership increases, Gratillonius must also contend with Niall maqq Echach, the leader of Northern Ireland who holds the Ysan king responsible for the death of his son. Compounding these complications is the ever-present threat of retribution by the Ysan gods, should the kingdom’s leadership make a misstep. But perhaps the greatest danger of all is unfolding from within Gratillonius’s own household, where, following the death of one of his nine wives, the gods have named an unsettling replacement: Dahut, Gratillonius’s own daughter.   As treachery mounts from within and without, Gratillonius must hold to his principles in defiance of the gods while still protecting Ys from the destruction closing in on all sides.  Dahut is the third book in Poul and Karen Anderson’s King of Ys series, which concludes with The Dog and the Wolf. less

After the fall of Ys, Gratillonius, once the King, must try to save his remaining people from the advance of the barbarians.