Under the Iron Sky by A.T. Emerald — book slip

Soraya Tollmere, a high-ranking commander, has spent her life fighting against the Dar’rak, an ancient enemy that has returned to claim the world under the Iron Sky.

As darkness spreads, Soraya's mission leads her into enemy territory, where she is captured by the Demon, a feared Dar’rak soldier.

Tasked with breaking Soraya to uncover humanity's secrets, the Demon finds himself drawn to the fierce warrior.

As their dangerous bond deepens, Soraya must navigate a world where loyalties are tested, and her greatest enemy might be her only salvation.

For fans of Samantha Shannon and SenLinYu.