The Last Apprentice: Attack of the Fiend (Book 4)

Thomas Ward, an apprentice to the local Spook, faces a rising threat as witches unite their powerful clans to summon a great evil. With the danger growing and the witches closing in, Tom and the Spook race to prevent this dark force from being unleashed. As Tom encounters his greatest challenge yet, he must draw on all his courage and cunning to confront the impending danger.