Jessa and the Lost Goddess. Chosen by the Masters, #1

The Right of the Firstborn: A firstborn eighteen years of age or older may answer any call-to-arms from a noble family. The task, once completed, will mark the individual as an independent adult, free to leave their parents' home, seek higher education or employment, purchase land, marry or not. This right may not apply to women in Jessa Copeland's city but, when she hears that Rowan Eckersley needs volunteers to travel with him to the Forgotten Isle, she disguises herself as a man and answers the young lord's call-to-arms.
Rowan means to find the Lost Goddess who has struck their city with an incurable plague, and kill her before the plague takes his mother's life. Jessa hopes to win her independence. Risking life and limb seems to her a small price to pay for the opportunity to escape her engagement to Beau, a man who would never permit her to go to school or learn a trade. Something else awaits Rowan and Jessa on the island, however, something far more dangerous than the goddess's monsters and undead minions: true love.
This is the first installment in a companion series for Asta and the Barbarians. Each new novella will introduce a couple who will be aiding Asta in a new mission in the long-awaited sequel, Asta among the Chosen.