The Stars Amid the Storm - Fire and Starlight Saga, #4

As Kato gains more ground in the ongoing war with magic, Astra, Ehren, Alak, and Ronan band together to counter his attacks. With allies joining them from the Fae realm, Naskein, Ascaria, Gleador, and other parts of the continent, they may finally have a shot at defeating the rising evil, but the path to any victory will be lined with tragedy, violence, and losses greater than they've faced before.
The only thing they know for sure is that the only way out is together. If they fall, they fall as one.