Chosen.

Lena is a healer-in-training with one obsession. She must master her magical Skill in time to heal her sister. Training at the Danesga is the only answer, the royal academy reserved for nobles and the Chosen - rare commoners elevated by the king for the sheer power of their Skill. Lena has lost hope, but then she stumbles into a deadly exchange of zahad, a secret substance the nobility have been using to artificially enhance their magic. She escapes with the help of a mysterious nobleman, Az, who sees her Skill and calls her a Changeling, an immensely powerful Skill - that leads to madness. Shaken, Lena investigates zahad and the Changelings, and sees hints that the glory of the Chosen is not what the people have been led to believe. Lena must grapple with her own obsession with perfection and the allure of corrupting power as she navigates a deadly court, her own unique Skill, and a man who challenges her every belief about love.