A Fate Inked in Blood by Danielle L. Jensen

Bound in an unwanted marriage, Freya spends her days gutting fish, but dreams of becoming a warrior. And of putting an axe in her boorish husband’s back. Freya’s dreams abruptly become reality when her husband betrays her to the region’s jarl, landing her in a fight to the death against his son, Bjorn. To survive, Freya is forced to reveal her deepest secret: She possesses a drop of a goddess’s blood, which makes her a shield maiden with magic capable of repelling any attach.