Young Tom, the seventh son of a seventh son, starts work as an apprentice for the village spook, whose job is to protect ordinary folk from "ghouls, boggarts, and all manner of wicked beasties."

One witch is the most feared, the most ruthless, and the most deadly of all the witches in the county. If she hunts for you, she will find you. If you have crossed her, you don't stand a chance. She is the witch assassin, and her name is Grimalkin. Grimalkin's one alliance is with Tom Ward, the Spook's apprentice. With Tom, she plans to rid the world of the most terrifying evil, the Fiend, who once did her great wrong. For the first time, fans of...

When witches steal Tom's inheritance and kidnap his relatives, Tom, the Spook, and Alice set out for Pendle Hill, a particularly dangerous district, in hopes of preventing the three witch clans from uniting to raise the Fiend.

Apprentice Tom and the Spook for whom he works flee to Ireland, where a powerful witch has joined forces with the dark mages trying to call forth ancient powers to destroy Tom.

"Thomas Ward faces his ultimate test as he and his master prepare to deal with the Fiend once and for all"--

Tom is reunited with his mother and must return to Greece to face a new and terrible threat from the dark forces, and a momentous decision must be made, causing a serious rift between Tom and the Spook that threatens to separate them forever.