The Prison Healer

Kiva Meridan is a survivor. After ten years of working as the healer in the notorious death prison, Zalindov, she has only one goal : stay alive. But then the Rebel Queen arrives at the prison on death's door and Kiva receives a message : Don't let her die. We are coming. When the queen is sentenced to a series of impossible elemental challenges, Kiva volunteers to take her place. If she succeeds, both she and the queen will be granted their freedom.
But no one has ever survived. With an incurable plague sweeping Zalindov, a mysterious new inmate fighting for Kiva's heart, and a prison rebellion brewing, Kiva can't escape the terrible feeling that her trials have only just begun.