Lost Serenity

How could a moment's anger destroy so much happiness?
It is a question that will haunt him. When an old enemy comes to Kasha-Asor to kidnap their daughter, armed with a weapon that could end everything, Keir is forced to leave an injured Quin on Lyagnius. But his quest for a cure and their missing daughter will come at a terrible cost.

Book #2.5 of the Redemption series.
Trigger warning: the loss of a child.