The Starlight in the Shadows - Fire and Starlight Saga

The saga continues... Astra struggles to find her place in her world turned upside-down. Those she felt she could trust more than anyone in the world have betrayed her. Her newest friends are the only thing keeping her going, but time is against them as a war builds on two fronts and every turn holds a new danger. Alak took a chance and made a choice that put him behind enemy lines, but for the first time in his life he finally feels truly useful.
Every move he makes must be carefully calculated or everything falls apart. If he messes up, a lot of people could very well die. Even though they're miles apart, they're working together, desperate to save Callenia and the surrounding kingdoms. If only they had more time. If only they had more allies. If only they could be together.