Short Synopsis
Sophie struggles to regain her magical powers as an epic war approaches, in the third book in Rachel Hawkins's Hex Hall series.

Full Synopsis
Just as Sophie Mercer has come to accept her extraordinary magical powers as a demon, the Prodigium Council strips them away. Now Sophie is defenseless, alone, and at the mercy of her sworn enemies—the Brannicks, a family of warrior women who hunt down the Prodigium.  Or at least that's what Sophie thinks, until she makes a surprising discovery. The Brannicks know an epic war is coming, and they believe Sophie is the only one powerful enough to stop the world from ending. But without her magic, Sophie isn't as confident.
 
Sophie's bound for one hell of a ride—can she get her powers back before it's too late?