Revenge of the Witch by Joseph Delaney

Young Tom is the seventh son of the seventh son. There is no inheritance for the seventh son. There is just one thing that a seventh son can do and that is to be apprenticed to a tradesman. And Tom is following that route. His mother has chosen a very unusual apprenticeship for him. He is to work or the village spook. Now the spook is not the most popular man in town. As a matter of fact, he has no friends. It is a very lonely life. The spook is in charge of protecting the villagers against ghouls, boggarts, and all manner of wicked beasties. Tom is not sure that he is cut out for this life. But it his duty to learn what he can. He very quickly finds himself disobeying the Spook's warnings and gets himself into trouble by mistakenly freeing the witch Mother Malkin. Can he right this wrong? Or will catastrophe ensue?