WILDFIRE (The Balance of Syrestia Book 1) by Deb Ellen

Evie has a promising new life as a ballerina, but this is shattered when her parents are killed by monsters. Discovering she can wield fire, she’s thrust into the perilous world of Syrestia, where she must protect her estranged brother and navigate her growing attraction to Kit, the powerful ex-assassin aiding her. As dangerous secrets about her heritage come to light, Evie finds herself at the heart of a deadly political conflict, making her both a saviour and a target. When a brutal attack threatens everything she holds dear, Evie must turn to an enemy to confront her true identity and master her volatile powers – or risk becoming the devastating force the Faeries fear she is.