The triumphant conclusion to New York Times bestselling author Claudia Gray’s dazzling Spellcaster series.

To save lots of the lives of countless people in Captive’s Audio, Nadia swore herself to the One Beneath-to black magic. Her program, and the town’s only hope, is perfect for Nadia to understand plenty of sorcery to hit back against the makes of evil. But now that she’s separated from her friends, her family, and her Steadfast, Mateo, Nadia is normally more vulnerable than ever before to the developing darkness.

The final battle lines are attracted, surprising alliances are made, and true love is tested in the action-packed conclusion to the breathtaking Spellcaster series.