Legend of Astridr

The Legend of Astridr: Birth
Before the Allegiance came Astridr, whose legend began long before her birth.
When the imprisoned seer Sonja is liberated by thirteen Viking warriors, a storm takes the lives of her rescuers and she's left dying and alone. The fae prince Hakon hears her cries-as does Freyja, goddess of the underworld, who arrives to negotiate for Sonja's soul.
In love and sacrifice, Sonja survives to bear a daughter, Astridr-while the bargain between the fae prince and the goddess lays the foundation for an immortal's legend.