Balor's Echo

The Fomorians lost at Mag Tuired. Everyone knows that story.
But Nessa Dowd can hear what the water remembers, and the water is not done.
Something old has moved under Corryvreckan - older than Balor, smaller than legend, and far more dangerous for having hidden beneath a famous name. It is not a return. It is an echo. And echoes carry the shape of what made them.
With Finn, April, Jack, and the rest of a team still marked by the last fight, Nessa follows the signal north - into the Gulf, through a city where ink moves on its own, and toward a name so old it has survived by refusing to be written down.
Balor's Echo is the sixth novel in the Debt of Moytura series: Irish mythology rooted in geology, grief, and the stubborn persistence of things that will not stay defeated.