The conclusion to the Spellcaster series. Nadia knows the only way to save her family, her friend Verlaine, and her Steadfast Mateo, is to swear herself to the One Beneath and learn how to defeat him and Elizabeth. But to do so, she must abandon Mateo and the world she knows, and risk the temptations of dark magic. As Nadia reluctantly plunges into blackness, Verlaine continues to struggle with her desire for Asa - a demon sworn to the One Beneath. Both Nadia and Verlaine know that such alliances are not easily broken, but time is running out. They must defeat the ugly spell hanging over Captive's Sound before it is too late.
