Revenge of the Witch by Joseph Delaney

This is the first in the series called the Last Apprentice. Tom is the seventh son of a seventh son which gives him some unique gifts. Since there are few opportunities for seventh sons to find work, Tom is asked to apprentice the local spook. The spook deals with all the unearthly and unmentionable things in the land. He deals with boggarts, ghosts, and witches. Tom is reluctant to pursue such a career but with little other options becomes the apprentice. While his master is away Tom is tricked into aiding a imprisoned old witch. His error costs him dearly. The pace is quick and some of the horror parts quite graphic. Recommended for grades 7 - 12.