The Hawkling - Rebecca Zahabi

The rebels on the other side of the Shadowpass are massing, and refugees are flooding in to the city. Scared, penniless and not exactly welcome, they are desperate for the protection of the Nest, and the powerful mages who live there. But there is dissension in the Nests ranks, and there is always someone willing to make money from the fearful. The mages believe they have a secret weapon - a  captured lightborn, kept prisoner by a magical slave collar and forced to do their bidding. But Tatters and Isha, tentative friends despite their suspicion of each others motives, know something the mages do not. The rebels are aware of the lightborn. They know how to deal with it. And they are ready for war...