Dahut
First came Roma Mater, the story of how the Roman soldier Gratillonius became a king. Next, Gallicenae, the story of the Nine Queens – the wives of the warrior-king. And now – Dahut, daughter of the King of Ys.
The senile gods of Ys have decreed that Dahut must become a Queen of that Christ-cursed city while her father, the King, still lives. The King would rather fall upon his sword than consummate this evil pact, but the gods of Ys need him too much to allow him such an easy end...
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Poul Anderson
Poul Anderson's name is synonymous with the golden age of science fiction, a master of speculative worlds where the future is as vast and varied as the past. Born in 1926 in the United States, Anderson's journey as an author was shaped by his fascination with history, science, and the unknown. A child of the Great Depression, he was drawn to stories that stretched the boundaries of possibility, whether set in the stars or rooted in the depths of myth. Over the course of his career, Anderson built a reputation for crafting intricate narratives that blend hard science fiction with the richness of historical and fantasy elements, making him one of the genre's most respected voices.
The King of Ys
The King of Ys is a historical fantasy – it is set in our world just before the fall of the Roman Empire and it mixes in the legend of the mythical city of Ys which was built below sea level on the coast of Brittany. Many of the characters in The King of Ys (Roman emperors, Christian saints, etc) are based on legendary and real historical figures.
The King of Ys consists of four primary books, and includes one additional book that complement the series but is not considered mandatory reads. The current recommended reading order for the series is provided below.

