Veins of Power by Becky Jane Fox — book slip

Lyra Bloom, a sharp-tongued redhead with a volatile vein of magic, has always relied on herself to survive in the lawless Outerlands. But when a mistake lands her in the hands of the Citadel, she's thrust into a world she despises.

As her magic grows stronger within the Citadel's walls, so does her desire for something dangerous and shadowed.

With whispers of rebellion and dragons striking from exile, Lyra must choose between becoming the weapon the Citadel desires or igniting the spark that could burn it all down.

First in the Threads of the Fifth Realm series.