Book #3 in the TFK series.
Aileen has received an invitation to the ancient grounds by The Devil himself.
The Ancient Grounds - the grounds where The Devil was born is known to be consumed with powerful, dark forces.
She knows it's a trap, but when her uncle: her only living relative becomes a hostage, she is forced to step in there.
Under mysterious circumstances, Nicholas's dad: Declan Astor returns to Fox-lands, confessing a secret to Nick. He wants Nick to take on a quest to Artembury: the city of Art. But there are many surprises waiting along the journey for him, some of which will alter his life forever.
With Aileen and Nicholas apart for the first time since the war started, will they survive the hardships without the power of their bond?
And with all their friends' lives in danger, they realize the demons are getting stronger than ever.
(Read the first two books before this)
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.