Hell hath no fury like a demon back from the dead.

Rosemary McGuire thought the past was dead. Unfortunately, she's dead wrong...because it's standing on her doorstep, very much alive. But this time, Caleb Lockwood's target isn't the hidden hard drive with the footage that proves demons are real. His target is Rosemary.

When Will Gordon comes home to find Rosemary gone, he trusts his instincts and reaches out to a network of friends forged in the fires of too many demon battles. Soon he, Michael, Audrey, and Glynis are casting supernatural nets far and wide in a desperate search. And Will is torn between hurling ungodly curses at who — or what — took the love of his life, and falling to his knees to pray for her safe return.

The truth isn't just a nightmare — it's a night terror. And Rosemary faces the terrible choice of surrendering everything she is to an unspeakable evil...or losing everyone she loves.

Unbroken Vows concludes the six-part Project Demon Hunters series.