'I stood there, terrified. My master was about to die.' The County is facing dark days.

But, for the Spook, it is the nights that are darkest.

Having always stood against evil, he is now haunted by vivid, terrifying dreams.

Dreams that seem to be more like premonitions ...With his precious library burned to the ground and his arch rival, Bony Lizzie, free again, things are falling apart.

As nightmares turn real, are the Spook's powers waning - just when he needs them the most?

Can Tom, the Spook's apprentice, face the dark alone?

The seventh chilling installment in the Wardstone Chronicles, the series that inspired the forthcoming movie The Seventh Son, starring Jeff Bridges, Ben Barnes and Julianne Moore.