'Witches, Mam? We've made an alliance with witches?' As the Spook's apprentice, Tom's first duty is to protect the County from the dark.

But now Mam needs his help in her homeland of Greece to rise up against one of the Old Gods, the Ordeen.

Mam has summoned a powerful group to fight, but among them are the Pendle witches.

Can Tom go against all the Spook has taught him and ally himself with the enemy?

What is the secret that Mam is keeping from Tom? And what sacrifices must be made in the battle against the dark?

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