Murder, mayhem and magic.
The Guardian - Blood in the Snow
When an ancient curse strikes down someone close to Philip and Fern, they are drawn into a terrifying adventure in Norway where they discover a man that cannot die, a secretive murder cult and must race against time to save a life.
Meanwhile, the police are closing in on Philip for a murder he didn't commit and his djinn demands that he give up control over his own body, leaving him potentially a silent observer in his own head.
Blood in the Snow is the second in the Guardian series, and reveals more of the secret lore of the djinn, and the secret history of mankind.